|“||Am I a troubled kid? Yeah, you could say that.||”|
–Percy about himself, in The Lightning Thief
Perseus "Percy" Jackson is a seventeen-year-old Greek demigod, the son of Poseidon and Sally Jackson. He is the protagonist and narrator of the Percy Jackson and the Olympians series and one of the main characters of The Heroes of Olympus series. Percy is the head counselor at Poseidon's Cabin and a former Praetor of the Twelfth Legion at Camp Jupiter, as well as belonging to the legion’s Fifth Cohort. He was the temporary host of the Egyptian goddess Nekhbet. Percy is currently in a relationship with Annabeth Chase.
Perseus "Percy" Jackson was born on August 18, to Poseidon, the Greek god of the seas, and Sally Jackson, a mortal who could see through the mist. He was raised by his single mother, Sally Jackson. Percy is named after the famous Greek hero Perseus by his mother for good luck because his namesake was one of the only heroes who had a happy ending and died a peaceful death. Sally's parents tragically died in a plane crash when she was five.
When Percy was a baby, his father, Poseidon, left to protect him and his mother from evil monsters. However, Poseidon visited him when he was in his cradle, which Percy described as a "golden glow" and his father's warm smile and a hand on his head. Soon, Poseidon left due to affairs in Mount Olympus. His mother would tell him that his father was “lost at sea”.
When he was a toddler, his mother married Gabe Ugliano, hoping his horrid smell will mask Percy from monsters, whom Percy despised and called "Smelly Gabe" because Percy had decided that his body odour that smelled like mouldy garlic pizza wrapped in gym shorts.
Strange things often happened around Percy, often resulting in him getting into some kind of trouble or getting kicked out of over six schools.
When he was just a baby, Percy was attacked by a snake but managed to strangle it to death, just like the famous demigod Hercules.
When he was in third grade, a large man followed him around when he was at school, but by threatening to call the police, the teachers eventually got the man to leave. However, nobody believed Percy when he said that the man had one big eye. They thought he was crazy and hallucinating.
Percy has never stayed at a school for more than a year, as he was expelled from every school he attended.
When he was in fourth grade on a trip to an aquarium, he accidentally hit the wrong lever on the catwalk when his school was visiting the Sea World Shark Pool and made his class take an unplanned swim.
In the fifth grade, percy accidentally fired a war cannon which hit the school bus at the Saratoga Battlefield.
This made a lot of people bully him and his stepdad also suspected something was wrong with Percy. Percy recounted that he was expelled from six schools over the course of six years.
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Percy is a very troubled 12-year-old boy who has been expelled from every school he has ever attended. Yancy Academy was where his troubles seem to be worse than usual. He has only one friend at the school, Grover Underwood, who is also Percy's best friend and who Percy often protects from bullies (little does he know that Grover is actually a satyr in disguise sent to get Percy to Camp Half-Blood quickly). During a field trip to a museum, Percy is annoyed by the school bully, Nancy Bobofit, for intimidating Grover and in a fit of anger, accidentally summons water from a nearby fountain to pull her in, but he didn't know how he'd done it. Mrs. Dodds, his pre-algebra teacher, witnesses the whole scene and tells him to follow her into the museum for a "talk." Suddenly, she turns into the Fury Alecto, and attacks him, looking like a bat with humongous fangs. Mr. Brunner, another one of Percy's teachers comes in and throws Percy a pen (actually Riptide). While midair, the pen transformed into the sword Riptide and Percy used it to kill Mrs. Dodds. However, when Percy returns to the bus and asks his classmates, nobody remembers Mrs. Dodds. The only person that may remember her was Grover, who always hesitated before he answered. Everybody else believed her name was Mrs. Kerr instead. 
Percy arrives back at the school and hears Grover and Mr. Brunner talking about his life being in danger and becomes very suspicious since extremely strange things have been happening recently. At the bus stop, Grover sees that the three Fates are looking at Percy while knitting giant socks. Soon after, the Fates snip the string of life. Later, he goes home on his own at the end of the school year, even though Grover asked him to wait for him at the bus stop. He arrives home to his horrible step-dad Gabe Ugliano and his friends playing poker. Gabe immediately demands money for his poker game and although Percy denies he has any, Gabe deduces that he has changed from the cab driver and forces it from him. Percy's mother arrives soon afterward and tells him that they can go to his favorite beach in Montauk for the whole weekend. Percy, happy that finally something good has happened, packs his things and leaves, but not before seeing Gabe get hit in the butt by the door when he does a weird hand gesture he saw Grover use. During their night in Montauk, Percy had a vivid dream. The dream features two animals, which is a horse and a bird attacking each other. At the same time, there is a voice(that Percy describes as so deep and evil that it turned his blood to ice) egging the two animals on. Percy was awoken by the pounding of the door. He and his mother are shocked to see Grover outside their cabin, without pants (which Percy recommends not to see that) coming to him and his mom, telling them to leave. Percy was confused at his friend's appearance, as he was a goat from the waist down and revealed himself to be a satyr. Nevertheless, his mother took them both in Gabe's prized possession, a 1978 Camaro and began driving at daring speeds through a blinding hurricane, and it was blasted off the road by a bolt of lightning. As Grover, Percy, and his mom tried to get out, they saw the Minotaur, a half man, half bull monster, who had been chasing them. The three of them managed to dodge it by following Ms. Jackson's advice to jump out of the way at the last second, but Grover was too slow and the Minotaur injured him but got distracted by Percy's mother. The Minotaur forgot Grover, grabbed Percy's mom by her neck, and she disappeared in a golden flash of light (it is later revealed that she was captured by Hades). Percy, enraged and in a surge of new power and anger, managed to defeat the Minotaur by breaking off its horn and stabbing the Minotaur in the chest just like the hero Theseus had defeated the monster before him. Percy dragged the unconscious Grover past a hill, and then passed out himself when he reached the porch of a house. He was cared for in the infirmary by Annabeth Chase, waking up three days later. He learned that he was at Camp Half-Blood, a place where demigods like him were trained to survive against monsters.
Percy learned that the director of the camp was the Greek wine god, Dionysus, who was very unpleasant and moody, and Mr. Brunner, the former Latin teacher from Yancy Academy, was actually the hero-training centaur (half human, half stallion), Chiron. Shown around camp by Annabeth, his new friend and head counselor of the Athena Cabin, he found out that all the campers were demigods, also known as half-bloods. He himself was a demigod, but no one knew his divine father. After being shown around the camp, he currently resided in the Hermes' Cabin (where all the unclaimed demigods went), whose head counselor was Luke Castellan. Luke befriended Percy and treated him with respect though they had a little bit of rivalry after Percy beat Luke in a sword fighting match. Afterward, Percy encountered Clarisse La Rue, counselor of the Ares' Cabin, who performed the "initiation ceremony," which was sticking Percy's head in the girl's bathroom toilet. Her plan backfired when Percy shot water out of the toilet to blast back at Clarisse and her buddies. This officially began their rivalry. Later in a game of Capture the Flag, Percy defeated Clarisse and three others single-handed when he touched the creek, which healed his wounds from the fight and gave him a sudden burst of adrenaline. After Capture the Flag, a hellhound summoned from the Fields of Punishment, came out of the forest and attacked him. Percy was nearly killed but Chiron managed to kill the hellhound. Clarisse tried to blame Percy for summoning the hellhound but Percy denied any knowledge of it. Percy's injury from the hellhound healed by touching the water; then suddenly, a holographic trident floated above Percy's head, which told everyone that he was the son of Poseidon, the god of the sea, therefore explaining his powers over water. As the monster was not from the forest, it meant that someone within camp had summoned it, because nothing, including weather, could enter the camp's magic boundaries without permission. Clarisse said that it was Percy who summoned it but Chiron didn't agree as Percy himself was attacked by the monster (it is later revealed Luke summoned this monster from Tartarus).
One day, Percy was offered a quest to retrieve Zeus's Master Bolt by Chiron. Chiron explained to Percy that Zeus lost his master bolt, and (since Zeus has a rivalry with Poseidon) blames Percy, as Zeus suspects that Poseidon is attempting to dethrone him because he was at New York (where Mount Olympus was) when the Bolt was lost. He believed that Poseidon told Percy to get the bolt since he himself couldn't steal another god's symbol of power so he could become king of the gods and Zeus was suspicious as Percy was in New York when the bolt disappeared. Chiron said that if Zeus doesn't get his bolt back by that summer solstice, he would begin a war with Poseidon and that would force the other gods to take sides. Percy accepts the quest and consults the camp's Oracle of Delphi. Soon after learning that Master Bolt has been stolen, Percy embarks a quest with his sword Anaklusmos, better known as Riptide, with Grover and Annabeth. Along the way, they face many monsters—the Furies, Medusa, Echidna, along with her pet/son Chimera. After Ares offers them a mode of transportation west, they arrive in Los Vegas, where they stumble upon the Lotus Hotel and Casino. They get trapped in the casino for five days (though it seemed like a few hours, leaving them only one day to complete their quest. They then faced Procrustes before finding their way to the Underworld. The trio faces Hades, the lord of the dead, who believes Percy stole the Master Bolt and his Helm of Darkness. Hades saved Percy's mother right before she died from the Minotaur, explaining the golden flash but Hades also thought that Percy stole his Helm of Darkness which was also missing. To make things worse, Hades finds the bolt and the helm of Darkness in Percy's backpack (which Ares gave him) and demands that he hands them over and he will give Percy his mum back. Torn between saving his mom and finishing the quest, Percy finally uses Poseidon's Pearls to find the missing gods' items. Immediately returning from the Underworld, he finds out that the war god Ares had put Master Bolt and the Helm of Darkness in the bag he gave them and challenges the god to a duel for possession of the bolt and the helmet, in which he wins unexpectedly. A dark force later revealed to be Kronos, stops Ares from killing Percy. Ares vanishes in his divine form, leaving the bolt and Helm of Darkness behind. Percy gives the helm to the Furies to return it to Hades, who in return sends back Sally to her apartment, and the trio goes to New York to return the bolt to Zeus. Percy gives Medusa's head to Sally, who uses it to turn Gabe into a statue.
Percy goes back to Camp Half-Blood, where everyone at the camp congratulates him, Annabeth and Grover included. At the end of the summer, Percy can't decide whether to stay at camp or enroll in seventh grade and live with his mom. He finally decides to go train to clear his mind, where he sees Luke training at swordplay. As they drink Coke together in the forest, Luke reveals he was behind the theft of the bolt and the Helm of Darkness, and vanishes. However, before he left, he summons a pit scorpion to kill Percy. Percy manages to kill it, but it stabs its stinger into Percy's palm. He tried to reach the camp but collapses. However, several forest nymphs carry him and after being fed ambrosia and nectar, Percy heals and decides to enroll in the seventh grade and come back to camp next summer.
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When Percy is attacked by Laistrygonian Giants at school, Annabeth rescues him along with Tyson one of Percy's friends at his new school who was at the school for a project. He was actually a Cyclopes which explained why he was extremely big. On the way to camp, in the Gray Sisters' Taxi, which is a taxi business run by the Fates, Percy learns some coordinates (the coordinates on where to find the Golden Fleece) that lead to something he needs. Percy arrives at camp to find the camp under attack by Colchis Bulls and drives them back with help from Tyson who is fireproof. He later learns Thalia's pine tree is poisoned, meaning the borders are weakened and the activities director Chiron has been blamed. Clarisse, the daughter of Ares and Percy's enemy, is assigned a quest to go to the Sea of Monsters (using the coordinates Percy received) to find and retrieve the Golden Fleece, which has healing powers for plants, animals, and humans which they need to heal Thalia's tree. Percy and Annabeth decide to go also, but Dionysus and Tantalus, the new camp director replacing Chiron, refused.
Meanwhile, Polyphemus, a Cyclopes, has captured Grover. Polyphemus believes that Grover is a female Cyclopes and he wants to "marry" Grover, for he is wearing a bridal gown. In desperation, Grover creates an Empathy Link with Percy so he can call for help. With Hermes' help, Percy, Annabeth and Tyson board Princess Andromeda, the ship Luke and his forces are on escapes. They fight the Hydra and defeat it with Clarisse's help and get on Clarisse's ship, the CSS Birmingham. The CSS Birmingham is a tribute to Ares. As they enter the Sea of Monsters, Clarisse, Tyson, Percy, and Annabeth have to get past Scylla and Charybdis. Scylla lives on a cliff, while Charybdis lives in the middle of the entrance to the Sea of Monsters. Instead of attempting to sail in between the sisters, Clarisse automatically goes for Charybdis and Tyson, a good Cyclops and the half-brother of Percy, supposedly perishes in Clarisse's ship after the ship got blown up due to malfunction problems leaving only Percy and Annabeth behind.
Percy and Annabeth then journeyed to many dangerous islands including the Sirens' Island and Circe's Island, and Annabeth tells Percy several stories about Thalia’s death, which she also mentions her prophecy. When they reach Polyphemus's island they join up with Clarisse (who managed to survive the explosion, Grover (who had been captured by Polyphemus, and later Tyson, who miraculously survived thanks to Rainbow, friendly hippocampi who dragged him out of the water. They leave with the Golden Fleece after fighting Polyphemus and defeating him, which Polyphemus stole many years ago. When they return to the mortal world, they send off Clarisse on an airplane to the camp alone to drape the Fleece on the tree, and Luke kidnaps Percy, Annabeth, and Tyson, but Percy reveals Chiron's innocence in a secret Iris message sent to camp which Dionysus send Tantalus to the underworld once more and restore Chiron's job. Percy challenges Luke to a duel, but unfortunately, due to Percy being out of practice and Luke being fully trained and experienced, he soon finds himself to be no match for Luke's polished swordsmanship and is swiftly defeated and very nearly killed by Luke. However, Chiron comes to rescue them with his strangely dressed relatives and they manage to chase off Luke and his allies. When they return to camp, the fleece is placed on the tree, which not only revives it but also brings Thalia back to her full life form. This revival was actually Kronos' plan, done so that he would have another chance to manipulate the prophecy that governs the future of Olympus and the Olympians.
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Thalia Grace, Percy, and Annabeth heard from Grover that two half-blood siblings, Bianca and Nico di Angelo, had been found in a middle school. The three immediately set out to find him. Grover had been waiting for their appearance. He explained that he found the two half-bloods and that they were enjoying a function in the gym. He was very nervous and embarrassed as the only person he could dance with was Annabeth, who had recently grown taller than him so he looked quite stupid "dancing" with her. Percy, having been forced to dance to blend in with the crowd sees the two half-bloods following Dr. Thorn, which was not a very good sign. Percy felt disgusted by the fact that Thalia was always powerful and a hero at everything she'd done and so thought it was now his time to shine and ran to save the di Angelo's from danger alone, though his plan did not work out as planned.
Then, Artemis and her Hunters appear and Annabeth falls from a cliff as she had climbed on Dr. Thorn with her knife before the Hunters shot him down with their arrows. Being a son of Poseidon, Percy did not feel Annabeth dropping into the water, which confirms the fact that she had been captured. The Hunters saved Percy and his friends from the manticore. After a while, Percy clearly understood that he and Thalia were not under speaking terms due to the fact that Annabeth had fallen down the cliff. Nico had taken a great interest on the fact that he was a demigod and exchanged many thoughts on the Greek gods, while Bianca had been dumbfounded and was summoned by Artemis with Percy, where Bianca pledged her life to Artemis much to Percy's protests.
Artemis then sends her Hunters to Camp Half-Blood with Apollo, her twin brother. When he got to camp, Percy had frequent dreams about Annabeth and that she was in distress. He even went to see the Oracle of Delphi, however, she didn't answer his questions and he left the attic in anger.
After a few days, the camp had a Capture the Flag game, where the Hunters were up against the campers. Thalia and Percy agreed to be co-captains of the demigod team while Zoë Nightshade leads the Hunters. During the game, he learned from Grover that Zoë had a bad dream about Artemis being in trouble, while Percy himself had a dream that Annabeth was suffering under the weight of some unseen object. Thalia told Percy to stay on defense to guard the flag, but when he saw that her team was about to be attacked, he ran up the middle and took the flag. On his way back, he saw Zoë running back with his team's flag and was tripped up by an arrow two feet from the line, allowing the Hunters to win.
Thalia then runs up to Percy, asking him what he was thinking as when she got to the flag's spot, it was gone. She then shocks him with Electrokinesis but claims it was an accident and apologizes. Percy, angry uses the creek water to splash her and claims that it was also an accident. Thalia and Percy begin to fight, each one summoning stronger attacks until Percy stopped, seeing the Oracle walking towards them. Percy simply watched as the Oracle approached Zoë, who asked about saving Artemis. The Oracle replied with a prophecy, saying:
Five shall go west to the goddess in chains,
Grover managed to use his nature magic to make an apple appear in front of the monster's face and the group rides it to a junkyard in Gila Claw, Arizona, owned by Hephaestus. They camp there for the night, but a limo appears and Percy's blood began to boil, which meant Ares was nearby. The god of war came out of the car and told Percy to get inside, as someone wanted to talk to him. Percy reluctantly does so and finds Aphrodite inside. She asks him to hold a mirror as she fixes some microscopic flaw on her face. As Percy watches her, she seemed to change into all the girls he had ever had a crush on. Aphrodite begins to talk about tragic love stories and eventually asked Percy why he was on the quest. He originally told her it was to save Artemis, but with some pushing by the love goddess, he admits that he is really there to save Annabeth. Aphrodite thrills at his response and tells him that she will make his love life very interesting, hinting that Annabeth and Percy will most likely have a romantic future together. She then sends him back to his friends and warns him not to take anything from her husband’s junkyard.
While passing through, Bianca took a Mythomagic game piece of Hades for her brother, Nico because it was the only one that Nico didn't have. Because of the slight mistake, a defective automaton came to life and started attacking the group. Percy notices a manhole cover at the bottom of the machine's foot and was planning to enter it, however, Bianca went in instead, sacrificing herself to kill the monster and save her friends. Percy and everyone else tried saving her, but they knew that it was completely useless as Grover announces tearfully that the next line of the prophecy has been fulfilled.
Thalia takes a truck and drives them to a river, where they rent a few canoes and Percy convinces a few Naiads to steer them to the Hoover Dam. When the Naiads start messing with him and Zoë, she tells him that they have never forgiven her. When they near the dam, Percy, along with Thalia and Grover, begin sprouting facts about the Dam, indicating the depth of their relationship with Annabeth is as the Hoover Dam was one of her personal favorites. They also make dam jokes about the Dam Snack Bar and the Dam Restroom, though Zoë was lost on the humor. As they go to get food, Percy hears the sound of a sea creature he had befriended earlier. He tells it to go away and wonders how it followed him, but is distracted by the sight of remaining Skeleton Warriors - Bianca had managed to kill one in New Mexico.
He runs into an elevator to escape them but then becomes trapped deep inside the dam. A tour guide, who turns out to be Athena, tells him that there is always a way out for those that are smart enough to find them, before ascending in the elevator. He is spooked when a girl appears behind him and he swings at her with Riptide, but the sword simply passes through her as she is a regular mortal. She then reveals she isn't so regular, as she sees the Skeleton Warriors for what they truly are and directs them away from Percy, who hid in a bathroom. As he thanks her, he introduces himself as Percy and that he has to go (which Rachel thinks means his name is Percy Gotta-go).
Up top, he warns the others of the danger and they are cornered at the top of the dam. He tells Thalia to pray to her father, but she doesn't think he will answer. He says that Athena thinks he will and Thalia asked her father for help. Two statues come to life and swat the undead skeletons away before flying the group to California. There, Zoë Nightshade, who knows a lot about Nereus, tells Percy to look for him by smell as it is different. Percy finds him and hangs on for dear life as the old man tried to shake him off. Percy tricks him into going into the sea, which makes Percy stronger. Nereus changes into many animals to shake Percy off, but his attempts fail and he eventually agreed to answer their question. Percy asked what the terrible monster that Artemis was hunting was, which Nereus says is easy and points to the water before escaping. Percy feels tricked into Bessie, the sea creature that had been following him, appears in the water. Grover understands it and they quickly learn it is the Ophiotaurus, the monster Artemis had been seeking as burning its entrails will give the person who does the power to destroy Olympus.
Just then, Dr. Thorn appears with a small force of mortals and attacked the group, wanting to make his own place in the Titan Army. He tried to convince Thalia to slay and burn the Ophiotaurus so that she could destroy Olympus but Percy manages to shake her out of her stupor. When they were cornered, Percy sends an Iris Message to Camp Half-Blood but finds only Dionysus on the other line. Mr. D makes Percy ask him politely for help, which Percy does between clenched teeth, and the god saves them by wrapping the manticore and his men in grape vines, saving their lives. Percy then reluctantly thanks Dionysus. He then sacrifices the Nemean Lion's pelt to Poseidon to ensure safe passage for Grover and Bessie back to Camp Half-Blood.
Percy then goes to see Annabeth's father, Frederick Chase, as he may have a car they could use to save his daughter. After meeting Annabeth's family, he is shocked that they are so much different from the way Annabeth had described them, as to him they only seem caring and loving. Mr. Chase wants to save his daughter personally but is told it is too dangerous for him, being just a regular mortal. He reluctantly agrees and gives them his car. Before they leave, Percy makes a promise to Mrs. Chase to tell Annabeth that she still has a home there with them.
As they drive up the mountain towards the Garden of the Hesperides, the car explodes due to a lightning bolt that struck it forcing them to complete the rest of the climb on foot. When they reach the Garden, Percy and Thalia find out that Zoë is a Hesperide after meeting her sisters, and she is poisoned by the dragon, Ladon. Then they continue on to the place where Atlas held up the sky, though they find Artemis holding that burden instead. Percy finds Annabeth bound and gagged by Luke and the General, who is actually Atlas. Percy challenged Atlas, but his sword becomes too heavy, as Ares curse had finally taken hold (Ares promised that his sword would fail him when he needed it most when Percy won against him before). They were thrown into battle where Luke and Thalia fight each other, while Percy tries his best to hold off Atlas. In the ensuing fight, Percy saw the ruins of Mount Othrys, rival capital of Mount Olympus and home of the Titans, rebuilding itself. He realizes that this meant that the Titans' chances of victory are increasing.
Zoë then intervenes, fighting her father, disappointed with what her father had done. Percy used that moment to ask Artemis to give him the sky as he realized that the prophecy had involved him and that only Artemis could have a chance against Atlas. He took it while Zoë and Artemis attacked Atlas together, but Zoë is hit and thrown against the wall speeding up the poisoning done by Ladon which begins to kill her. Artemis managed to push him back under the sky while Percy rolled out of the way. Sadly, Zoë began to die as Percy ran up to her during her last moments. She tells him that he is nothing like Hercules who had betrayed her before and she is proud he carries the weapon she made before dying.
Percy rescued Annabeth and they manage to escape the mountain, thanks in part to Frederick Chase shooting the monsters with his plane using Celestial Bronze bullets. He, along with Annabeth and Thalia, then go to Mount Olympus on Blackjack and his friends, Guido and Porkpie. While flying, Percy and Thalia believe that Luke is dead as Thalia had thrown him down a deep chasm, but Annabeth believes otherwise. Percy becomes slightly jealous with the affection Annabeth was showing for Luke, which surprises him because it has never really bothered him before now.
When they arrive in Mount Olympus, the winter solstice meeting had already begun, and they begged Zeus to believe that Kronos was indeed rising. Thalia then chose to be a lieutenant with Artemis to replace Zoë, before giving Percy a hug. When he said she wasn't allowed to do that anymore (as Hunters can't become attached to males), she says she was merely honoring a friend. The gods then voted if they should kill Percy as he is the only known child of the Big Three to reach sixteen for the Great Prophecy in two years. Fortunately, many of the gods vote to let him live after Artemis declares that if he is killed, then the gods are then no better than the Titans. Poseidon also vouches to let the Ophiotaurus live, although kept in Mount Olympus so it wouldn't be a "bargaining chip" against the other gods. Before Percy leaves Olympus, Poseidon tells Percy in private that he has done well and he is proud of him.
Back at camp, Percy tells Nico that his sister had died and gives him the Mythomagic figurine of Hades that Bianca meant to give to Nico. However, Nico blames Percy for not protecting her and throws the figurine away, telling him he hates Percy. At that moment, four of the Spartus appear, somehow managing to get past the Camp Borders. Nico thinks that they are for him and unintentionally splits the earth to swallow them and send them to the Underworld before fleeing into the forest. Percy, realizing that Nico is a child of Hades after the incident, tries finding him, but to no avail. While discussing Nico's abilities with Annabeth, Grover appears, claiming that he'd heard Pan's voice in his head. The three then promise to keep it a secret as Percy knows that Nico could also be a child of the Great Prophecy, but instead says that he himself will take the responsibility of the prophecy instead.
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Percy Jackson thinks that freshmen orientation won't be fun, so his mother shows him the bright sides ("Tomorrow, you're off to camp! After orientation, you've got your date"). Orientation turns out to be hosted by empousai. When he is accompanied by a mortal acquaintance, Rachel Elizabeth Dare (which Percy thought she lived at Hoover Dam), who he met at Hoover Dam in The Titan's Curse, she tells Percy to leave the room when she spots the demon cheerleaders that Percy had encountered when he went in through the side of the building to ignore Rachel. As Percy leaves, he ends up having to fight the empousai and runs into Annabeth along the way. They were supposed to see a movie together, but Annabeth is upset when she sees Rachel with him because she is jealous to see Percy hanging out with her when they were clearly supposed to be at the theaters. Annabeth takes Percy to Camp Half-Blood, a camp just for demigods like them. Percy finds his half-brother Cyclops, Tyson, cleaning their cabin. Quintus (actually Daedalus in disguise), the new swordsman, is accompanied by Mrs. O'Leary, a hellhound that develops a soft spot for Percy.
During a game that Quintus made up, Annabeth and Percy go through the rocks of Zeus's Fist and fall in a dark cavern which they later find out is an entrance to the Labyrinth. Annabeth is offered the quest she has been waiting for since age 7: She must enter the Labyrinth, find Daedalus, and get Ariadne's String before their arch enemy, Luke Castellan does. Luke has been planning on burning down Camp Half-Blood and is trying to use the Labyrinth to get there, guided by Ariadne's String. As Annabeth goes inside to get her prophecy, Percy waited outside and felt a little worried when Annabeth didn't come back for a long time. When she returns, Annabeth begins to tell everyone what the Oracle had told her, but she doesn't say the last line saying she doesn't remember. This strikes Percy as strange that she would forget something so important and begins to wonder what the last line could be. Annabeth takes Percy, Grover, and Tyson along with her. Together, they enter the maze. They are joined by Hera for a short time. She tells them that Percy knows the way, but Percy doesn't know what she means by that. When they take a wrong turn throughout the maze they run into Nico, son of Hades, at the Triple G. Ranch. Nico is accompanied by King Minos’s ghost, who tries to convince Nico that they are not his friends. Once they get out without Nico, Percy and the others run into a quiz show run by a Sphinx.
After they escape from the Sphinx, they find an exit that takes them to Hephaestus, who has them travel to one of his forges to find out who has been using them and in return, he will help them find Daedalus. Percy gets lost in the inner depths of Mount Saint Helens while battling fierce Telekhines. Before parting with Annabeth, she kisses him for luck. Percy faces four full-grown telekhines. They attempt to burn him with lava, but Percy, being a son of Poseidon, is hard to burn. In desperation, he unleashes an incredible amount of power and blasts out of Mt. Saint Helens, creating an explosion that damages the volcano, stirs Typhon in his sleep, and causes the evacuation of hundreds of thousands of people living around Mt. Saint Helens. He ends up falling into Ogygia, where he meets Calypso, a young girl whom Percy thinks is much prettier than Aphrodite herself. Percy must leave the island and Calypso (who has fallen in love with him) behind. Calypso lets him use a magic raft that will take him to any place he wants, and the only place he can think of is Camp Half-Blood.
He returns to the shores of the camp and finds the camp strangely empty, except the amphitheater where everyone has gathered. As it turns out, they were getting ready to burn his shroud. Annabeth took the stage to say her final words, stating "He was probably the bravest friend I've ever had. He..." She then suddenly saw him and starts hugging him fiercely until she realizes she was making a big scene in front of all of the other campers. As they talk about plans to navigate the labyrinth, Percy realized he knew the answer after talking with Hephaestus on Ogygia; they need a mortal with clear sight to guide them. Once they are accompanied by Rachel, they run into a wide arena, where Percy battles a dracaenae and the demigod Ethan Nakumura. Sparing Ethan, Percy challenges his giant half-brother, Antaeus, the arena master, that is accompanying Luke so that Luke's army can pass. Percy kills him by luring him off the ground, as his mother is Gaea meaning he is invincible on the ground.
When he finds Annabeth and Rachel again, Rachel leads them straight to Daedalus' workshop, who tells them that he is Daedalus and the name Quintus was only a cover, and he also reveals that they are too late; Luke got there first and took Ariadne's string. He says that Rachel is better and more accurate than the string. Monsters then attack the workshop, dragging in Nico in chains. Percy, Rachel, Annabeth, and Nico escape and leave Daedalus and Mrs. O'Leary to fight the remaining monsters. They find another entrance and enter the maze once again. Once they navigate through the maze, Percy hears the Titan Lord speak to him. Taking Annabeth's invisibility cap, he goes into the room and opens the coffin. There, not fully formed, is Luke. As much as Percy hated him, Percy did not draw Riptide. He finds the demigod whom he spared earlier in the maze, Ethan. Ethan joins the Titan's side and Kronos comes to life in Luke's body. Percy barely escapes, thanks to Nico and Rachel (who had hit Kronos in the eye with a blue plastic hairbrush).
While they were going through the Labyrinth, they meet up with Tyson and Grover again. Together, they all find Pan, the god of the wild, who tells them he is dying. As his spirit dies, it goes into the mouths of each of them except Nico, and it seems that Grover got a little bit more than the rest. Rachel leads them to New York, where pegasi take Percy, Annabeth, Grover, Nico and reluctantly, Tyson. The five of them had to leave Rachel behind because she is fully human. They go to help the camp ready for the Titan army's arrival. Battling side by side is Annabeth and Percy. Percy and Annabeth fight Kampê along with Briares's help. Grover, in a panic, screams so loudly that it scares the Titan army back into the Labyrinth. Grover's dryad girlfriend, Juniper, insists that it was Pan's wild scream that had scared the Titan army the first time. As Percy gets up, Daedalus comes and tells them that the Labyrinth is tied to his life. The child of Athena (Daedalus) dies, and so does the Labyrinth. Percy, Annabeth, and the other uninjured campers take the wounded to the Big House.
Percy decides to leave camp and go celebrate his birthday with his mom. Two surprising visitors stop by while Percy, Tyson, his mom, and Paul Blofis (Percy's mom's new boyfriend and fiancée) are celebrating. First, Percy's father Poseidon comes and tells him that he fears Luke/Kronos is only temporarily defeated and when Percy blew up Mt. Saint Helens, Typhon stirred in his sleep. Finally departing with Poseidon, Percy decides to go to his room to plant the garden he had earlier promised Calypso. As he does, Nico stops by and tells him that he needs to tell Percy things about how they might be able to stop the Titan army. Percy then invites him for cake and ice cream.
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Percy is in school when he hears strange noises and spots Clarisse La Rue outside. Clarisse is being attacked by arrow-throwing birds. Percy gets himself excused from class and goes to help Clarisse and find out why she is there. Clarisse is surprised, and not very happy to see him.
After the two of them have defeated the birds, Clarisse reluctantly agrees to tell Percy why she is not at Camp Half-Blood. Clarisse reveals that she is supposed to be taking care of Ares' War Chariot, and needs to get it back to Ares' temple by sundown. However, her immortal brothers, Deimos and Phobos (gods of terror and fear respectively) have stolen the chariot. Phobos comes to taunt Clarisse and gives them a hint about where to find the chariot. Together, Percy and Clarisse must go to find the chariot at the Staten Island Zoo.
On their way, they encounter Deimos, who is riding a sea serpent, but they quickly defeat both the minor god and the sea monster and continue on their way. At the zoo, they find the chariot and face the two minor gods again. Phobos and Deimos show Percy and Clarisse their worst fears, which are Camp Half-Blood and his friends in flames and Ares respectively. By overcoming the illusions, however, Percy and Clarisse easily defeat the two minor gods (it turns out that Phobos and Deimos are both extremely weak in battle without their powers of fear and terror).
Finally, just as sunset is fading, Percy and Clarisse bring the chariot to Ares' Temple on the Intrepid, an aircraft carrier. Percy promises Clarisse that he will not tell anybody about her worst fear. He also tells her that in the vision that Phobos showed him-of what he feared most-Clarisse was included as one of Percy's friends.
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Percy and Charles Beckendorf are on the same team for capture the flag, and the two war god cabins (Athena and Ares cabins) and the Aphrodite Cabin are on the other. Beckendorf, a son of Hephaestus, has a somewhat awkward conversation about girls (as he has a not-so-secret crush on Silena Beauregard for three years) and thinks Percy should ask out Annabeth Chase to the fireworks.
They set off into the woods and stumble on a huge Myrmekes anthill. Silena and Annabeth capture Percy, while Beckendorf charges straight ahead into the ant swarm as he tries to take back a huge bronze dragon's head, but immediately is bitten in the leg and has acid spit in his face.
Percy, Annabeth, and Silena want to rescue him but they need help so they take the metal head along to try to find the rest of the body of the bronze dragon which was once one of the camp's defences against monsters before Thalia's pine tree. They finally get the monster started (a dragon with no wings) which is an automaton and get it to help Beckendorf. It blasts open the ants' nest and the ants all attack the dragon. Meanwhile, Percy, Annabeth, and Silena dart in the ant hill through tunnels and chambers full of weapons, armor, and jewelry and all a manner of other magic items as they find and get Beckendorf back out. When they come out and start fleeing, Beckendorf saves the bronze dragon from being ripped apart by the thousands of Myrmekes by activating its' ultimate defense system which causes the dragon to blast arcs of blue electricity from all over its' entire body.
After the demigods finish watching the dragon drive the remaining Myrmekes back into their anthill the dragon spots them and turns berserk on them. Percy distracts the dragon until Beckendorf could jump on the dragon's back and temporarily deactivates it. Silena is very relieved that Beckendorf is alive, and when he asks her to the fireworks, she gladly accepts the invitation.
Once they get back to camp, it turns out the Capture the Flag Game has not ended yet, and Annabeth puts them in Capture the Flag Jail. Percy and Beckendorf protest, but they wouldn't listen and get ready to go back to the game. Before Annabeth leaves to go back to the front line to fight for her team, she asks Percy out to the Fourth of July Fireworks, the biggest dating event of the summer at Camp Half-Blood, but she quickly leaves before Percy could answer. Percy and Beckendorf share a few lines about girls and it is revealed that the girls' team won the game, before the story ends.
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Persephone has called by tricking all three children of the Big Three (Percy, Thalia, and Nico) into coming into the Underworld to retrieve Hades' new sword from a demigod spy who stole it. The problem is that Hades' Keys are in it, which lets anyone out or into the Underworld. Persephone gives them a magical carnation to track the half-blood, and when all the petals fall off, it would mean that the sword has made it out of the Underworld. Percy, Nico, and Thalia must retrieve the sword before time runs out.
At first, Thalia refuses to help because the forging of the weapon is illegal. All the other gods (especially Zeus) must know it first and agree in its creation. Creation of a new weapon (and symbol) destroys the balance between the gods' powers. But the danger that the weapon implies can free the souls from the Underworld, so she figured she must help catch the thief. They catch the thief after interrogating Sisyphus, fighting and killing a group of violent Keres, and crossing Lethe, the River of Forgetfulness, after which they have a run-in with Melinoe the goddess of ghosts, who takes the forms of Maria di Angelo and Beryl Grace. The demigod thief is, as they suspected, Ethan Nakamura, but all the petals fall off the carnation because Ethan has raised the Titan Iapetus from Tartarus.
When Percy fights against Iapetus, he flings him into the River Lethe, thus causing the Titan to lose all his memories. Although Percy also falls in, he stays dry because of his powers, being the son of Poseidon. Percy tells Iapetus that he is his friend Bob, and Iapetus believes him, and becomes harmless as a result. Nico then has the Furies carry them and Iapetus back to Hades' palace.
When they return to Hades and Persephone with the sword, something goes wrong. Hades is very unhappy about the sword's creation and leaves in anger, threatening Persephone never to disobey him again. They later find out that Persephone requested the sword against Hades' orders to tip the power of the Big Three into her husband's favor, and that she had tricked them. Percy and Thalia return to the world above, but Nico stays behind to find Iapetus a job in the Underworld and to work with his father on a plan to help the Olympians fight the Titans. Nico also reminds Percy of their plan they had discussed at the end of The Battle of the Labyrinth, though Percy is still ambivalent.
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Percy is driving Paul Blofis's Prius with Rachel Elizabeth Dare, while on a quick vacation to the South Shore. Rachel is flirting her way into a relationship, Percy describes that he "felt like one of Apollo's sacred cows—slow, dumb, and bright red." They are soon interrupted by Charles Beckendorf and Blackjack landing on the hood of the car. Rachel briefly kisses Percy and Beckendorf makes a joke about not telling Annabeth about that little scene. Percy responds by saying, "Oh gods, don't even think about it." Then Beckendorf tells Percy that its time to initiate their plan to destroy Princess Andromeda, Luke's demon cruise ship inhabited by Kronos's Army. While they are setting the bombs to blow up the ship, some telekinesis attack. Percy distracts them to give Beckendorf time to arm the explosives. He battles Kronos, but Beckendorf is already captured. Because the explosives have no timer and Beckendorf has the detonator in his watch, he sacrifices himself to help Percy escape and carry out the plan and Percy jumps off the side of the ship and he loses consciousness.
In the water, he drifts to Poseidon's palace under the sea where he meets Tyson and other relatives. Poseidon is fighting Oceanus and his army, ageing rapidly due to the state of his kingdom being destroyed. Percy wants to stay and fight, but he must return to Camp Half-Blood to relay news of what happened on Princess Andromeda to the campers. Chiron and Annabeth agree to show him the Great Prophecy, and after reading it he learns that his fate is to make an important choice and to have his soul reaped by a cursed blade. Percy is all keyed up for a while afterward until a confrontation with Annabeth when she calls him out as a coward. As he contemplates his fate, Nico returns to discuss the secret plan introduced in The Battle of the Labyrinth. He wants Percy to bathe in the River Styx to become invulnerable like the hero Achilles. To do so, Percy Jackson must first discover how Luke could do it and they go visit his mother, May Castellan in Connecticut, where they find her insane and unstable. She does tell them that Luke came and asked her for her blessing for something that he needed to do. They also meet the goddess of the hearth, Hestia, who shows Percy visions of the destruction being caused by Typhon. Percy and Nico visit Sally and Paul back in the city, to get her blessing. She insists that Percy is now his own person and that she has to let him go. Nico leads Percy to the Underworld, where Hades reveals that it was all a trick to make Nico the child of the prophecy. Nico rescues Percy, though he seems to have lost his trust, and takes him to the Styx, where he is submerged in the water and becomes invulnerable, but for one tiny spot on his lower back.
The war begins and Percy leads the group of demigods into a dormant Manhattan to battle monsters and demons, while the gods are battling the monstrous Typhon in the east. Rachel arrives, revealing that she has had a vision which read, "Perseus, you are not the hero. It will affect what you do." Ethan, who was aiming at Percy's Achilles Spot during a battle to invade New York City nearly killed Percy but Annabeth had pushed herself in the way as if she had a feeling that Percy was in danger. Percy is furious and horrified, knocking Ethan unconscious with his sword. Kronos threatens Percy to surrender or he will kill Annabeth, but Percy calls Blackjack who takes her to a hotel in a plaza. Annabeth is seriously injured, and Percy tells her where his Achilles spot is and that she saved his life. Annabeth remarks he looks "cute when worried" and that his eyebrows "get all scrunched up." When Kronos makes it to the Hall of the Gods, Percy battles him to stop the destruction of the Olympians' Thrones. Kronos asks Ethan to kill Percy as he knows where his Achilles' spot is, however, Percy convinces him that what he is doing is wrong. Ethan then attacks Kronos and strikes him on the shoulder with his blade. However, due to Kronos also bearing the Curse of Achilles, Ethan's blade cracks and he harms himself fatally. Kronos then opens up a fissure which causes Ethan to fall to his death for his betrayal. Annabeth is able to convince Luke to resurface. She reminds him of his promise that he would protect her and asks Percy to give him the knife so that he can end everything. Percy hands over the knife, discovering he was not the hero after all, but his choice to give it to Luke was the decision he had to make. Kronos is blown to dust and scattered by the wind, and Luke dies a hero's death. Right after that, the gods arrived after successfully defeating Typhon and are shocked to see Luke's dead body on the ground.
Through deaths and betrayals, the demigods stand victorious. Percy is offered the gift of becoming a god, but declines due to his feelings for Annabeth Chase. He remembers how he felt when Annabeth might have become a Hunter of Artemis and notices Annabeth looks about the same way that he did then. Because of this, he declines their offer in favor of a request. He requests that the gods claim their children by the age of thirteen and that Camp Half-Blood construct cabins for Hades and the minor gods so their children have a place at camp. When he comes back to Camp Half-Blood, he finally expresses his feelings for Annabeth and they kiss twice, the first time in Camp Half-Blood's mess hall, and the second time being underwater, due to which a group of eavesdroppers tosses them into the lake, the latter which he describes as 'pretty much the best underwater kiss of all time.' At the very end of the book, he and Annabeth share a moment of bliss as they race toward the road down Half-Blood Hill back into the mortal world, not looking back at Camp Half-Blood for once.
Between the Series
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Percy celebrates Grover's birthday party alongside Juniper and other dryads at Prospect Park in Brooklyn. After gifting Grover aluminum cans, the satyrs suggest playing Pin the Tail on the Human, frightening the only human present - Percy. However, before the game could begin, Apollo arrives and greets Percy and Grover. They attempt to tell him that they're taking a day off to celebrate Grover's birthday, but Apollo interprets this as a day off to help him.
Apollo takes Percy and Grover to the side in order to introduce them to the Celedones, a trio of golden automatons who sing in beautiful harmony and will perform with the god in a concert at Mount Olympus. Grover protests that they sound fine, but Apollo reveals that the celdeones are a quartet and one had gone rogue after Hephaestus' two-thousand-year warranty expired. Percy complains that Apollo could retrieve the celedone himself, but he explains that he needs to perform a sound check for the concert and that heroes are supposed to run the gods' errands. He suggests for the two to search at the Theater District of Manhattan as celedones are always looking to be "discovered." Grover realizes that a celedone singing in public could create mass panic causing Percy to agree to the quest, but asks why he picked the two to complete the quest. Apollo reveals he likes Percy and that his experience with the Sirens during the Sea of Monsters is a similar challenge. He summons his personal lyre and tells Grover that his immunity to magical music and ability to play the lyre's magic will aid in the capture the celedon. He sets the rendezvous at the Empire State Building by sunset before vanishing.
Percy and Grover (who doesn't bother to disguise himself) take the subway to Times Square as it is located in the middle of the Theater District and filled with tourists and Broadway performers. While searching, Grover bumps into a hot dog vendor cart and clutches the lyre protectively. Percy questions the use of the lyre, but Grover explains that if the right song was played, it could create anything. Percy expresses doubt as Grover's skills on the reed pipes waver between days. The satyr spots the celedon approaching a mic on an outdoor stage and it prepares to sing causing Percy to stuff wax in his ears. He explains the difficulty in fighting automatons with mortals and manipulates the Mist to show a presidential motorcade to the cops in order to block off the area.
As the police block off the exit, Percy uncaps Riptide and attacks. However, the Celedon's song resonates through the earwax and causes mortals to weep in depression. Grover frantically imagines a cage around the celedon while playing the lyre, but instead summons a brick wall between Percy and the celedon. The momentum causes Percy to crash into the wall and topple it over the celedon who regains her composure and begins singing a song about Apollo and the sun. Percy begins wrestling with the automaton but notices that the heat resonating from the song has melted his earwax and signed his shirt. Grover attempts to think of a cage for the celedon, but random shifts occur due to him being nervous. With no other choice, Percy swings Riptide forcing the celedon to stop singing and transform into a quail who flies to the top of Times Tower.
Percy and Grover ride the elevator to the top of the tower and climb stairs to reach the roof. They spot the celedon serenading Times Square with "New York, New York." Percy thinks of shoving her off the roof but reminds himself that she would transform into a bird causing an idea to form in his head and asks Grover if he can use the lyre to summon a birdcage. Grover protests that birds should be free, but realizes Percy's plan and promises to try. Capping Riptide, Percy asks Grover for the blindfold he was going to use on Pin the Tail on the Human and approaches the celedon. As she finishes singing her song, Percy jumps on her back and gags the celedon as Grover strums the lyre for a birdcage.
The celedon, however, attempts to throw Percy off the roof of Times Tower while Grover nervously tries to think of lyrics. A birdcage of Celestial Bronze begins to form, but the celedon spins Percy off her and pushes him off the tower. A metal rung catches his pants belt, but the momentum causes Percy to slip out of his pants and continue falling. The demigod snares onto a billboard to prevent himself from falling and reveals that he wears plain blue boxers claiming they're more comfortable than briefs. The celedon smiles down at Percy and begins singing about Percy letting go of the billboard and falling.
Percy wills himself not to listen and thinks of Annabeth and his saving of her from the Sirens. He imagines her anger and resolves that it is scarier than monsters, breaking the automaton's spell. Percy realizes that the celedon would only transform into a bird if she was startled and uses the Empathy Link to tell Grover his plan. He asks the automaton for an autograph and Grover tells her to check his pants for a pen. The celedon complies and uncaps it only to be startled by the appearance of Riptide. She transforms into a bird, but Grover grabs her and shoves her inside the birdcage. He laments that he scratched Apollo's lyre and imprisoned a bird, deeming it to be the worst birthday ever.
Percy reminds Grover of his situation and the satyr, now focused as the celedon is imprisoned, plays a tune that summons a rope for Percy. Upon noticing the sun starting to set, Percy states that they have to meet Apollo at the Empire State Building, but Grover suggests for him to put his pants back on. They arrive at the lobby where Apollo literally brightens upon seeing them. He exclaims that he'll have Hephaestus fix the celedon, but notices the lyre's scratch. Percy intervenes and tells him to have Hephaestus fix it causing Apollo to lighten up. He invites the two to watch his concert, but Percy lies, claiming they're not worthy of his music and might explode. Apollo buys the excuse and leaves with the celedones for his concert in a flash of light. Grover suggests picking up Juniper at Prospect Park to attend the sing-along and eat s'mores at Camp Half-Blood. Percy winces at the mention of the sing-along but agrees to go for the s'mores, claiming that they may still have time to turn Grover's birthday around.
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While celebrating their one-month anniversary, Annabeth asks Percy what he had planned for their special dinner on that night. Percy, who never remembered promising something like that, stalls for time just as Hermes arrives. Percy takes Hermes into his truck to talk, where the god reveals that while he was delivering packages to Janus, Cacus snuck into his truck and stole his caduceus. Because Hermes doesn't want to be seen looking for it, as the other gods would never let him live it down, he sends Annabeth and Percy to find it for him. Annabeth takes out her Video Shield and at first when she said 'Let me see Cacus,' the shield shows her the city of Seacacus New Jersey. After she rewords the sentence and finds that the giant Cacus is in the meatpacking district.
When Percy and Annabeth get there, they climb down a ladder into the sewers and find an underground cavern. There they meet Cacus and he tries to sell them watches and clothes, which Annabeth quickly notes are fake. When Percy asks for the caduceus back, Cacus claims he will figure out how it works and become the god of traveling salesmen, mostly by forcing George and Martha to listen to him. Annabeth and Percy go on the attack, with Annabeth stabbing him in the back of the knee and Percy stabbing his leg. However, Cacus backs her and Percy into a corner, destroys Annabeth's shield, and is about to turn her to stone when George and Martha turn into a cell phone. They escape the cavern when Percy calls thousands of gallons of New York sewage to him and it pushes them to the surface.
Annabeth then comes up with a plan and runs to a crane, knowing how to operate it as she observed them on Olympus. Percy lures Cacus under the crane's large hook and Annabeth drops it on his head before picking him up and swinging him into the air, where Percy destroys him with the caduceus' Laser Mode. Percy and Annabeth then return the caduceus to Hermes, who is very grateful. When questioned what other enemies the gods have and what exactly Zeus has been threatening, Hermes dodges the question. As a reward, however, Hermes transports them to Paris for special dinner gourmet foods. Their night ends with Percy and Annabeth walking by the river and Annabeth wondering what Percy has planned for their two-month anniversary, which makes Percy happy that she sees a future for them in a month.
Even though Percy does not appear in this book, it is revealed that he and Annabeth are officially dating. For most of the book, his location was unknown with the only clue being that he disappeared around the same time that Jason Grace, a son of Jupiter, first physically appeared. It is eventually revealed that Jason and Percy were exchanged by Hera/Juno to unite the demigods of Greece and Rome against Gaea and the Gigantes as well as other creatures.
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Percy Jackson is being attacked by the Gorgons, Stheno, and Euryale, intent on avenging their sister, Medusa's, death. The sisters seemingly could not be killed as they reform every two hours while none of their attacks wound Percy because of the Curse of Achilles. He had been running from them for three days ever since they saw him. He had woken up at the Wolf House, having no idea who he was or how he got there (and wondering why the Gorgons can't kill him), and met Lupa, two months before the encounter with the Gorgons. The only thing he remembers is a dim memory of Annabeth. He believes what Lupa and the Gorgon sisters have told him about himself, that he is Percy Jackson, a demigod, the "son of a barnacle-encrusted god from five thousand years ago," which is Poseidon, whom they only know as Neptune. Percy then knocks out Stheno and uses her tray to slide down a hill.
He meets up with June, a goddess disguised as an old lady and she gives him a choice: carry her to the other side of the road, or leave everything and go to the ocean, creating a new and invincible life for himself. Percy chooses to carry June to the camp, even though it means that he will lose the Curse of Achilles. After reaching the borders of the camp, he uses water from a nearby river to create two giant hands that destroy the sisters (as the water breaks their connection to the Earth). The waters of the river seemed to have also washed away his Curse of Achilles, as after the waters receded, Percy felt like he had been in an acid bath and he felt vulnerable. Just then, Percy is met by many demigod children, including Frank Zhang, Hazel Levesque, and Reyna Avila Ramírez-Arellano (who has met Percy before). June introduces him as a son of Neptune and Reyna seems to know Percy somehow when she hears his name. June then shows her true form as Juno and the campers bow in respect, except for Percy who thinks that because he carried her all this way, he didn't feel that she deserved his respect (and also because Percy didn't particularly like Juno in her Greek form Hera).
Reyna then orders Hazel to take him inside where she could question him. Percy then meets Octavian in the Temple of Jupiter and then meets Nico di Angelo, who he does not remember, but he does think that he knows him from somewhere. From then on, he is initiated into the Roman camp where he impresses some of the campers with his battle prowess during that night's War Games. At the end of the game, Mars himself appears and selects Frank, his son, and Percy for the quest to free Death. Percy vaguely remembers his antagonism towards his Greek counterpart, Ares. He somewhat visualizes that they had a fight in the past. They embark on their quest using the only vessel in the Roman Navy, a pathetic rowboat named the Pax.
They sail to upper California where they meet Iris and see the Giant’s army. They then move to Portland where they encounter Ella and the wicked king and seer, Phineas who also appears to have knowledge of the past, present, and future although he is blind. Ella was wanted by Phineas as he thought she was a very precious harpy because of her knowledge. His intentions were to tie her up and keep her like that but the three friends find it cruel and make a bet with Phineas. They find the location of Thanatos when Percy gambles with Phineas using poison and healing Gorgon blood. By tricking Phineas, with Gaea's help, Percy is able to take the healing vial, from then on his memories begin to return. They eventually reach Seattle and the Amazon company which is run by Hylla, Reyna's sister and also the former secretary of Circe.
After escaping the Amazon compound with great difficulty, the group fled to Frank's house in Canada where his grandmother lived, who, unfortunately “had an appointment with death” as the house burst into flames. She had told Frank that he was a descendant of Neptune and he could turn into anything. This had a great effect on Hazel as she was told by Pluto that she would be freed by her curse (blackouts about her pasts whenever she thought about them and finding cursed jewels wherever she was) by a descendant of Neptune. She had thought it was Percy but now she had no idea who would free her. Hazel had also kissed Percy on the cheek for his moral support. From there, they went to Alaska as more of Percy's memories returned. After arriving on the Hubbard Glacier, Frank was able to free Thanatos by burning a piece of wood which contained Frank's life. When the wood burned out Frank would die but only after Frank played a big role. He had entrusted his life with Hazel. Meanwhile, Percy fought off a legion of Roman undead warriors, using his powers to create a hurricane and a massive tidal wave. While Hazel, Frank, and Arion tried to kill Alcyoneus, Percy jabbed Riptide into the glacier. This caused several fissures to open up and all the undead soldiers and Percy himself went falling off the glacier into the sea below. After Frank and Hazel kill Alcyoneus, they retrieved Percy who had the Roman standard and was waiting on a block of ice for them to return.
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Percy is seen walking with Hazel and Frank as the Argo II arrives at Camp Jupiter. Annabeth comes up with a plan to appease the Roman god of borders Terminus and allow them to enter Camp Jupiter. Camp Jupiter Praetor Reyna, on advice from Percy, allows Annabeth, Piper, and Jason to descend from their ship to have a meeting in the camp borders. Discussion over the Prophecy of Seven appears to go well and Reyna is on the verge of agreeing to co-operate. However, Leo, possessed by an eidolon, uses the Argo IIs ballistics to fire at Camp Jupiter, causing a fight to break out between the two camps.
Jason, Annabeth, Percy, Hazel, Frank, and Piper escape to their ship with the Romans hot on their tail. They begin their journey to the ancient lands, making a few necessary stops and visits to certain gods in the U.S before they can leave. After many obstacles, they get to Rome. In Rome, many more monsters attack, with the worst to come. When the demigods of Camp Jupiter realized that Rome was their destination, they resolved to instead go to war with Camp Half-Blood, and they march toward New York. This, however, isn't their only problem. Annabeth, assigned a mission from her mother Athena to recover the Athena Parthenos, must go her own way and thus Percy becomes extremely worried. Furthermore, he still has to face his own problems, including drowning. After he battled with the twin giants Otis and Ephialtes (succeeding by working together with Jason and Bacchus, the Roman form of Dionysus), Percy goes on to help Annabeth, even though a child of Athena must go alone. However, though he finds her in a workable situation that quickly changes.
Guarding the Athena Parthenos was Arachne, who Annabeth tricked into trapping herself. As Arachne falls into the abyss of Tartarus (she and the Athena Parthenos were over the void of Tartarus), she shot out silk spider webs, one of which wrapped around Annabeth's ankle. Annabeth gets dragged towards to Tartarus, and Percy desperately holds onto her.
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Percy and Annabeth have been falling for 9 days into Tartarus. They see the ground and a river rushing up to them, which Percy uses to catch them in their fall. The river was the river Cocytus, the River of Lamentation. It gave the two thoughts of giving up and drowning but Annabeth manages to get them to shore. The air in Tartarus is poisonous, and according to Annabeth, smells and tastes like styrofoam peanuts, which Percy remarks, smells like his stinky ex-stepfather, Gabe Ugliano. To enable them to survive the horrors of Tartarus, Percy and Annabeth drink from the flaming river, the river Phlegethon, which allows monsters to endure the punishments in Tartarus. After drinking from the Phlegethon, Percy and Annabeth feel much better and are able to journey through Tartarus. They come across various reformed monsters and Titans, such as Hyperion, and to their surprise, an old friend of Percy comes to help, the good-turned Titan, Iapetus. Iapetus, known as Bob, help them on their quest and allow them to find and close the Doors of Death. However, along the way, complications start to unfold as Bob starts to remember who he is. As they pass a golden bubble, in it the reformed Hyperion, Percy asks Bob to burst his golden bubble since Bob is the only one with a weapon. They then come across the arai. Percy pleads with Bob for help, but Bob hesitates and allows him and Annabeth to get hurt because he realized that they were the ones who wiped his past memories. Seeing Annabeth in deep despair and blindness, Percy has no choice but to battle the arai, resulting in him getting the curse of slowly dissolving. This stretches back to the previous book, The Son of Neptune, where Percy had a bet with Phineas, resulting in Percy surviving after he prayed to Gaea. Phineas then cursed Percy to die a painful death through dissolving. However, Bob finally decides to help after seeing who his true friends were. Together with Annabeth, he takes Percy to the giant Damasen's hut, to get him healed. With that, Percy is restored to his original health and the trio continue their journey to the Doors of Death. Percy and Annabeth use the Mansion of the Night to reach the Doors of Death. However, they are soon faced with great difficulty as the Death Mist fades and they can be seen by the hordes of monsters present at the Doors of Death. On top of that, the primordial of the pit, Tartarus, also takes on a physical form and begins his attacks on them. Percy intends to battle Tartarus, but is stopped by Annabeth, who feels that Tartarus is way too powerful and is a 'class by himself'. Bob and Damasen both agree with Annabeth. With much reluctance, Percy gets into the elevator with Annabeth and journey back into the mortal world, with a promise he makes to Bob to say 'hello' to the stars for him. Percy and Annabeth meet the other five demigods in Epirus and back on the Argo II, he fulfills his promise to Bob, by looking in the starry sky and saying "Bob says hello," before the Argo II continues sailing in the night.
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After the group is informed that they must subdue the goddess Nike in the city of Olympia, Percy Jackson, Frank, Hazel, and Leo decide to investigate, as their godly parents do not have any strong rivalry between them. They reach the site where the original statue of Zeus used to be there. Percy and Leo provoke Nike by remarking that Adidas shoes were much better than the Nike shoes. Nike, driven by her Greek/Roman schizophrenia orders a fight between the Greeks and the Romans. The demigods then hatch a plan to kidnap the goddess and start a mock fight. During the fight, Percy tells Leo, much to the latter's shock that he had discovered about his secret visit to Calypso, and promises to help him. The demigods then fight Nike's servants, the Nikai, angering the goddess. She charges at Leo, but Percy quickly causes the water to explode beneath the chariot, smashing it and sending the goddess flying. Leo and Frank tie her up and take her to the ship. Afterward, the Argo II is caught in a hurricane and Jason and Percy go underwater to find out. There, they discover that the storm is being caused by the goddess, Kymopoleia, a daughter of Poseidon, who worked for Gaea. The giant Polybotes arrives and captures Percy in his net. Jason promises to honor the goddess. Kymopoleia accepts and decapitates Polybotes. After curing Percy, Kymopoleia warns him that he was yet to face his fatal flaw. Later, Percy, Annabeth, and Piper sneak through the tunnels to Athens and attack the Giants. He and Annabeth are caught by the Giants. After they cut Annabeth's thigh, the rest of the seven attacks. The assault goes well until Percy's nosebleed wakes the earth mother. Just then, the gods storm in and fight the Giants with the demigods. Percy and Poseidon fight Polydectis. After the battle, the seven learn that Gaea had risen at Camp Half-Blood. While thinking of a fast way back, Zeus suggests slapping the Argo II back to Long Island which they agree on. The second they arrive at Camp Half-Blood, Percy fights off Octavian's recruits. When the battle is over Percy, Annabeth, Piper, Jason, Frank, Hazel, and Nico meet at the Big House to talk about Leo. Frank and Hazel tell the others about Leo's plan. They are angry at first but calm down when the two cry while explaining it. Over the next few days, the Greeks and Romans get along and he is present at the campfire before the Romans head back to Camp Jupiter. Reyna and Frank then tell him that he and Annabeth can attend college and live in New Rome as long as they want. They soon tell Nico, who is happy for them. Nico then tells Percy that he had a crush on him, but is now over him, shocking Percy.
Shortly after the defeat of Gaea and the Giants in The Blood of Olympus, Percy was asked by a publisher in New York to write down what he knows about the Olympian gods, to which the young demigod agreed, reasoning that it would help inexperienced demigods survive any unexpected divine encounters with a major Olympian. Percy proceeds to compile all of the stories that the demigods of Camp Half-Blood and Camp Jupiter told him over the years.
After finishing his narration of the book, Percy mentions being late to a meeting with Annabeth, which worries him.
A year after finishing writing Percy Jackson's Greek Gods, Percy is approached by the same New York publisher, who, very impressed with the last book, asked him to write one more, this time focusing more on the Ancient Greek heroes. While Percy had originally refused, he was finally persuaded by an offer of a year's supply of free pepperoni pizza, along with numerous blue jelly beans. Percy reasoned that this book would help his fellow demigods, instructing them on how to properly defeat most of the infamous monsters that they might happen to come across.
Right after finishing his narration of this book, Percy reveals that after the events of The Blood of Olympus, he and the rest of the Seven started the tradition of monthly Argo II reunion parties, and he is quite worried about being late to the current one.
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A giant crocodile has been terrorizing Long Island, along with other magical disturbances in the area. Percy approaches and stabs the beast in the rear with Riptide. The crocodile proceeds to spit out Carter Kane and run away. In the process, Percy's orange Camp Half-Blood T-shirt get splattered with mud, leaving the words on it unreadable to the other boy.
Much to Carter's surprise, Percy can clearly see his wand and khopesh, which would have been impossible for a mortal. Despite meeting almost all magicians in the North American nomes, Carter has no idea who this person is, only that everything about him seemed un-Egyptian.
Percy tries to get Carter to thank him for rescuing him from the crocodile, but Carter is somewhat embarrassed and ends up getting angry at Percy's comments instead. The two then get into a small argument over the ownership of the monster, with Percy thinking that the monster is Carter's pet after he said it was his monster, but only meant he was chasing it. Percy then asks Carter if he is a son of Ares as he must be a half-blood of some kind. He also asks why his sword is all bent, but Carter tells him it is supposed to be like that, being a khopesh. Carter also gets angry at Percy's use of the word half-blood (as his dad is African-American and his mom is white), as well as Percy offering to help because last time Carter was eaten by the crocodile.
Carter accidentally uses the "Fist of Horus" to cause a fist to knock Percy right out of his shoes and into the swamp. Carter instantly rushes over, thinking he might have killed Percy, but is hit in retaliation by a huge wave of water generated by the angry demigod. Percy lunges at Carter with his sword, forcing the latter to defend himself, not able to attack due to Percy's superior skills with a sword. During the fight, Percy accuses him of being a monster, which Carter angrily denies. Percy also asks if he is an escaped spirit from the Doors of Death, or if the monster was his pet and Carter was just trying to find it.
The fight ends when Carter uses some magic rope to tie Percy's sword to his head just as Percy hit his arm, causing Carter to bleed. During the small break, Percy comments that Carter must be a half-blood since the Celestial Bronze sword would have passed right through him had he been a mortal. Percy also asks if he was a rogue demigod who used to be part of Kronos' Army. After listening to Percy talk for a bit, Carter starts to realize that Percy isn't a magician and is something completely different, as Percy keeps using words related to Greek mythology. The two form a truce so that they can go after the crocodile, as it has been terrorizing Long Island for weeks now. The two also introduce each other, eventually revealing their names.
They eventually find the crocodile terrorizing a small cul-de-sac with a few kids spraying the monster with water guns and hitting it with water balloons. Carter sees a gold necklace around the crocodile's neck and tells Percy that they need to remove it to stop the monster, as it can't be killed. Percy tells Carter to distract the crocodile so that he could get it. Carter makes a large avatar of Horus around himself and attacks the monster. Percy then jumps on the crocodile and tries to unlock the necklace, but can't, as he isn't a magician. As Carter's avatar fades and the crocodile crashes into a house, Carter and Percy switch places. Percy creates a massive whirlpool in the center of the cul-de-sac using the water generated by the crocodile. The crocodile is swept up in it and Carter manages to make it to the necklace. As Percy begins to tire, Carter finally manages to remove it and the crocodile returns to its original form; that of a baby crocodile.
Percy and Carter run off with the baby crocodile after hearing some cop cars approaching. Resting at a nearby diner, Percy and Carter watch the news, as they report that a freak sewer incident had destroyed the homes in the cul-de-sac. Carter and Percy wonder if someone is trying to bring them together to cause trouble and agree to keep their respective worlds a secret from each other until the time is right. Carter takes the necklace and the baby crocodile with him but places an enchantment on Percy's hand so that if he ever needs to contact him, all he has to do is say his name. The two part on good terms.
While Percy himself never actually appears in this story, is mentioned multiple times by Annabeth, who was taking the subway to his apartment before encountering Sadie, and is implied to have gone there after her adventure.
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Annabeth goes to Percy's apartment and tells him about a dream that she had from her mother Athena, about trouble brewing in Manhattan. They take a ferry to Governor's Island where a freak hurricane has caused all the mortals to evacuate. While they are trapped on the island surrounded by snakes, they attempt to contact Carter and Sadie Kane but fail. Annabeth and Percy decide to face Setne, who is reading from the Book of Thoth, by themselves. They make a plan to use invisibility cap to sneak up on Setne, while Percy distracts him. Before running off into battle, Percy gives Annabeth a kiss in case they die. While Percy is sneaking up on Setne, he trips and falls on his butthole which makes him noticeable to the magician. Setne knows that Annabeth is using her invisibility cap and captures her, stating that he's been using invisibility magic for as long as the pyramids have been existing. Setne then uses a magic spell that pins Percy to the ground. Setne reveals that he was watching Annabeth and Sadie when they were battling Serapis and that it was an experiment to see the powers that Annabeth and Sadie possessed.
Setne summons Wadjet briefly so that he can consume her essence and take the Crown of Lower Egypt that she wears. Before he destroys her, he takes a selfie with her to "remember" the moment. Annabeth concludes that once he puts two crowns of lower and upper Egypt that he will destroy the world. Setne claims he learned that a "little" demigod blood is good for starting a war, but Percy stops him by hitting him in the gut with Riptide. With Riptide protruding from him, he absorbs the sword's essence and learns about all of Annabeth and Percy's adventures. Suddenly, Sadie and Carter arrive and attack Setne with a camel, but he manages to escape.
The squad decides to regroup and decide to plan while heading south of the Governor's Island. Carter and Annabeth decide that they need to combine attacks to defeat Setne. Carter gives Percy his wand turning into a kopis and Sadie teaches Annabeth the Egyptian word for exploding. In exchange, Annabeth teaches Sadie the Greek word for exploding and gives her invisibility cap to Carter.
When the squad finds Setne, he is trying to summon Nekhbet. They all charge, but fail at attacking Setne. Nekhbet is successfully revived and tries to attack Setne, but Percy and Annabeth pull her away since Setne is trying to consume her essence. Setne drops the Book of Thoth when Carter yells "stahp," and then he disappears with Nekhbet's Crown of Upper Egypt.
Nekhbet decides to stay with the four teenagers to get her crown back and help destroy Setne. She suggests that she merge with Percy since mixing Egyptian and Greek powers worked earlier. Percy reluctantly agrees to it, but only because it's the only way to defeat Setne. After merging with the goddess, they go off to find Setne again. After finding him, the quartet goes after the crown so he doesn't turn in the ground. Setne talks about Carter's dad, and Carter takes off his hat of invisibility and goes to attack Setne in his avatar form, but Setne blasts Carter to the ground. Setne then rambles on about why he wants to be immortal including getting souvenirs after him such as snow globes. After Carter gets blasted, Percy turns into his vulture avatar form, and Sadie whispers something into Annabeth's ear. Percy grabs Setne and swoops him into the air. While in the air, Setne tells Percy he was a fool for giving up immortality. Nekhbet agrees with Setne that Percy was foolish to turn down immortality, but Percy fights back then plummeting to the ocean. Once in the ocean, Percy regains all of his strength, drops his avatar form, grabs Setne by the throat, and drags him to the island. A newly bandaged Carter greets Percy, along with Annabeth and Sadie who have drawn a circle on the ground. Percy decides to make him suffer for eternity instead of destroying him. While sealing him off, Carter thinks of Setne's snow globe idea and traps him in a snow globe. Sadie reveals that she told Annabeth her secret name earlier, but Annabeth states she's already forgetting all the magic she learned.
Percy and Annabeth decide to not tell Camp Half-Blood, at least not yet. The four determine that they will remain in contact. Sadie and Carter Kane fly off, and Percy and Annabeth go on a date afterward.
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Apollo takes Meg McCaffrey to Percy's apartment because he thinks he can help them. When they arrive, he asked Apollo what he was doing here and was shocked to find out that he was not a god anymore. He invited the two in when they said they were being followed by malicious spirits.
Percy tells Apollo that he will take him and Meg to Camp Half-Blood, but he needs to focus on his school work as he promised Annabeth that they would attend New Rome University together and that he would also like to meet his younger half-sister. On the way to camp, the three of them are attacked by three Nosoi. One gets to Percy but he summons water from an underground pipe and washes it off of himself and Apollo before the disease becomes deadly, but becomes congested. He gestures for the fallen god to thank him, which he does. Percy tells the two to go back to the camp, while he talks to a police officer that has just arrived on the scene, and that he will visit the camp on the weekend.
During Nero's attack on the camp, Percy and Mrs. O'Leary arrive via Shadow Travel and proceed to attack the huge Colossus, with Percy slicing off spikes from the automaton's crown and throwing them to the ground. He and Chiron distract it, while Apollo takes it down with a plague arrow.
After the battle, Percy and Rachel talk with Apollo about what he is going to do next. After he tells them the prophecy he heard in the Grove of Dodona, Percy interprets that his help will be here momentarily, and Leo Valdez arrives shortly afterward. While the rest of the camp both greets and hits Leo, Percy is so overjoyed, that he only hugs Leo, after which he proceeds to somewhat awkwardly greet Calypso. Percy heads back home soon afterward, diving underwater with Mrs. O'Leary.
Apollo mentioned Percy when thinking about the pros of twenty-first-century demigods, he complements the son of Poseidon's driving skills. Meg also mentioned that Percy taught her not to jinx her quests.
Grover mentions Percy, wishing he were with them. Apollo also mentions constantly how handy the son of Poseidon could be on their quest.
Percy is mentioned by Annabeth to Magnus when he asks her advice about traveling through the oceans and she responds by saying it is time for Magnus to meet Percy Jackson, her boyfriend.
Percy is seen training Magnus in order to prepare him for his journey across the seas. Percy mentions that he will be going straight back to New York to babysit his baby sister. Later on, he and Annabeth are last seen when they are driving back to New York in Percy's Toyota. 
After Loki was captured and Ragnarok avoided for the moment. Magnus calls Annabeth and she signs the Chase Mansion over to him. She states that when she and Percy reached California something bad had happened. This is later revealed to be the death of Jason Grace.
|“||He’s actually pretty intelligent, but he acts so dumb sometimes. I wonder if he does it just to annoy me. The guy has a lot going for him. He’s courageous. He’s got a sense of humor.||”|
–Annabeth about Percy, in The Demigod Files interview
Many people tell him he is brave, such as friends, family, strangers, and even gods and goddesses. He also states that he has the same "brooding" look as his father, that always branded him a rebel, and that his mom, Sally Jackson, also has a rebellious streak just like him. Annabeth mentions that he is technically smart but seems to act dumb; and is obtuse, meaning he doesn't always see the obvious even when it is right in front of him, such as people's feelings and what they are trying to say indirectly. Despite this he is perceptive when he wants to (or needs to) be; he could tell that Gaea wanted to keep him alive and gambled his life knowing that he was too valuable to Gaea for him to die at that time. Percy can also be derisively sarcastic and moody, and he dislikes being manipulated or forced to obey. Percy also has small feelings for Annabeth Chase at the beginning of the series and these feelings became romantic over the course of the series, but he finally confirms it in The Last Olympian. Although Percy is a leader at Camp Half-Blood, he is considered a troublemaker in school, with a track record of expulsions, like most demigods. His dyslexia makes learning and reading difficult and his ADHD makes it hard for him to be attentive or to sit still in class. He has never been one of the "cool" kids in class because he hangs out with supposedly "un-cool" people, such as Tyson or Grover Underwood. Possibly because of his bad history in school, Percy feels a strong level of affection and attachment to Camp Half-Blood.
After getting his memories taken by Hera, and living on the streets and fighting monsters, Percy has developed a "wolf stare" that says "No matter how bad you think you are, I'm worse," which enables him to scare off people like gangsters. He is not afraid of anything in the mortal world anymore, including gangs. He notes that it is probably Lupa's influence on him, as he stayed with her and her pack for weeks. Despite being very confident in his own abilities, Hazel Levesque can sense there is a quiet sadness in Percy like he saw his destiny and knew that one day he would face a monster he couldn't beat (similar to how she feels about Jason Grace). In The House of Hades, Hazel states that Percy was a child of Poseidon's better nature: powerful, but gentle and helpful, a person that would guide ships safely to the shore rather than destroy them.
While in Tartarus in The House of Hades, Percy is starting to show a darker and more dangerous side of himself in his personality. He begins to question himself about his morality, and if he's really a good hero or not. He wonders about the people he had previously treated with apathy: Bob, Calypso, and Nico di Angelo. After his return, Percy tries to make up for his tattered relationship with Nico by thanking him for visiting Iapetus and leading the Seven to the Necromanteion. While battling Akhlys, Percy taps into his rage and controls poison to overwhelm Akhlys—to the point where even Annabeth is terrified of him. In Tartarus, there are many instances where Percy feels hopelessness and fear, although he ultimately overcomes it. He's shown to be more prone to aggression when he vows to destroy Gaea and avenge Bob and Damasen, something which does not seem to disappear towards the end of the book.
After the events of The Blood of Olympus, Percy seems to be less impulsive. He has grown a bit tired of the constant dangers of a demigod and looks forward to living a normal peaceful life as much as possible. The cunning sorcerer, Setne tried to manipulate Percy but it backfired on him and Percy succeeded in capturing him. Percy gives more priority to his family and even turns down Apollo's offer to go on a dangerous quest to help the latter regain his godhood. However, he does small favours to Apollo as it is his principle to aid demigods as much as possible.
|“||To save a friend, you would sacrifice the world.||”|
–Athena to Percy about his fatal flaw, in The Titan's Curse
Hence, when Gaea finally awakens in The Blood of Olympus and Jason and Piper are determined to help Leo and Festus defeat her, Percy intervenes, intending to fight the Earth Goddess himself. However, before Percy's fatal flaw dooms the war and the world (as Mars had predicted) Frank intervenes and manages to convince Percy that he must let Jason and Piper do it instead.
|“||He's good-looking, but don't you dare tell him I said that.||”|
–Annabeth Chase about Percy's appearance, in The Demigod Files interview
After he slew Polybotes in The Son of Neptune, Percy received a tattoo of a trident and SPQR on the underside of his arm to signify that he is a full member of the Roman Twelfth Legion Fulminata. After Annabeth and Percy's reunion in The Mark of Athena, Annabeth says that Percy grew even more handsome, muscular, taller and that his lips are salty. According to Piper in The Mark of Athena, Percy smells like the sea, looks like a skater and a troublemaker, but she can still see what women would like about him, even if he isn't her type. Piper later states that when Percy pleads, his sea-green eyes seemed to be "like a cute baby seal that needed help," and marvels at how Annabeth had ever won an argument with him.
Abilities and Tools
Percy as the demigod son of Poseidon is an immensely powerful individual as stated by multiple characters in the series in which he has appeared and is one of the most powerful demigods in the series. The only other demigods whose powers rival his are Jason Grace, Thalia Grace, Nico Di Angelo and Hazel Levesque. He has fought and defeated many monsters probably more than any other demigod in the series as well as other demigods, gods, titans, and giants. He on more than one occasion has contributed to the salvation of Olympus and the world as a whole. Percy has these abilities and traits:
- ADHD: Percy's supernatural alertness and keen senses that keep him ready for, and alive, in battle. It also lets him analyze his opponents fighting style as well as pick up minor details about an opponent, such as where their muscles tense so he can tell which direction they'll attack from. This is one general trait of demigods.
- Dyslexia: Percy's brain is "hard-wired" for reading divine Ancient Greek instead of mortal languages. During his time at Camp Jupiter he learned to understand, and possibly speak, Latin to an unknown degree. This, along with ADHD, is a trait common to most demigods.
- Dreams: Like most demigods, Percy had dreams that showed him events occurring in the past, present, and future. However, due to the unpredictable nature of his father, and the raw power the sea god possesses, Percy's dreams are a lot more potent than those of other demigods. He has managed to even view the dealings of fellow demigods, such as Luke, and even ancient ones such as Hercules; gods, such as Hades; and even conversations of Kronos himself, something Luke proclaimed was impossible. It is also possible that like many Ocean dieties, he possesses some inate prophetic abilites manifesting as dreams.
- Fighting Skills: Percy is a naturally talented and excellent swordsman and his skills continues to grow as time passes, capable of holding his own against and even defeating larger, more experienced, and more powerful opponents, including gods like Ares and Hades and Titans like Hyperion and Kronos (though the latter three were accomplished only after Percy had bathed in Styx even though it should be noticed that Percy also beat Kronos once without the Curse of Achilles and it must be noted Ares had underestimated Percy) as well as monsters. In The Sea of Monsters, even when Percy had only trained for a year at the time, was already regarded by other campers to be better than any other camper in Camp Half-Blood at swordplay in the last hundred years, with many even comparing him to Luke in swordsmanship. At this point, Percy sparred against entire cabins at a time, and rather easily beat the guys from the Apollo Cabin. Despite being out of practice when he fought Luke, Percy was briefly able to fight him off, but was overpowered rather easily. Percy was skilled enough to repeatedly injure the giant cyclops, Polyphemus until he was laying on his back, and defeated Ethan Nakamura in swordplay. In The Son of Neptune, even after losing the Curse of Achilles, he is still shown to be able to fend off an entire army of continually resurrecting ghosts by himself while still protecting Frank and the golden eagle of the legion. His Greek training and unpredictable, solo fighting style make him particularly dangerous to the demigods of Camp Jupiter, who are used to fighting as a group, allowing him to easily defeat multiple opponents at once as shown in The Son of Neptune. Percy had enough skill to easily defeat an Amazon. According to Frank, Percy "fought like a demon." When possessed by eidolons, Percy fought Jason Grace on even footing (Piper couldn't believe the speed of their sword fighting which she described as a 'blur', as they exchanged multiple of blows that lasted only a second) and injured him to a point that he was knocked unconscious. However, it should be noted that Jason was distracted by Piper's charmspeak at that particular moment, which allowed the possessed Percy to exploit the opening in Jason's defense. In The Son of Sobek, Carter admitted that Percy was a way better swordsman than he was. Percy had even said that there is not a lot of people who could fight him that well, indicating Percy himself, is a better swordsman than most. Percy has also shown many of times that he could talk while fighting, with little effort.
- Enhanced Physical Condition: As a demigod Percy is faster, stronger than a normal mortal, as well as being more agile and durable. These physical attributes have allowed him to perform feats normal human can't, as well as survive situations mortals cannot. As he is a son of one of the Big Three, he is thus physically more powerful than most other demigods.
- Enhanced Strength: Being a demigod son of Poseidon, Percy is shown to be considerably stronger than a regular mortal and being a son of one of the Big Three, his strength surpasses most other Demigods, able to knock out demigods with one hit, rip out the Minotaur's horn, able to deflect giants attacks, topple a seemingly insurmountably strong Polyphemus, strangle a snake when he was a toddler, and forced the tip of Porphyrion's spear into the ground while the giant was running, causing the giant's own momentum to flip himself over and that was when he was still injured. He had even held on a ledge, while supporting Annabeth's and his own weight with just his fingers, without much discomfort.
- Enhanced Durability: Being a demigod, Percy is shown to be more durable than regular humans as he was thrown to solid rock by a giant and only managed a nosebleed and later still defeat multiple giants, shook off a hard kick in the chest from the Olympian god Ares, speedily recovered from a dodgeball thrown by a Laistrygonian Giant, brushed off from a whack in the chest by a giant, shook off hard hits from the Titan, Atlas, withstood a hard blow from Kronos without the Curse of Achilles and many other feats.
- Enhanced Agility: Being a demigod, Percy is shown to be more agile than a regular mortal as he was able to leap on the huge Minotaur neck, dodge several slashes from Ares, the climb up to Anteaus head in a matter of seconds, vaulted over Polybotes's knee, somersault over a line of Roman shields, and able to keep his footing on a huge slippery, shaking crocodile, all with impossible agility, with Carter comparing his agility to gymnastics. His greatest feat of agility had to be in the Hidden Oracle, when he leaped from a giant statue head to it's shoulder and slip down the ship's rudder like a fire pole with impossible agility. Even the god, Apollo had to admit he was moderately impressive. He even jumped over a 20 foot wide river, despite having Annabeth on his back in Tartarus. Later, Annabeth saids she has no idea how he did it.
- Enhanced Reflexes : Being a demigod, Percy reflexes are faster than a regular human. Percy was able to deflect a bullet that can travel 1,700 miles per hour, even when he barely even seen the bullet in the Titans Curse. His reflexes also allow him to cut a volley of arrows in half in The Sea of Monsters.
- Wit: Percy is quite intelligent in his own right, skillfully capitalizing on his surroundings and his opponent's weaknesses and egoes when he cannot overwhelm them directly. This has been shown numerous times, such as when he tricked Ares into walking into a pressurized tide in The Lightning Thief, when he choked the Nemean Lion on space food so that Zoë and Bianca could shoot the inside of its mouth in The Titan Curse, when he tricked Antaeus into jumping into chain (depriving him of his mother's rejuvenating touch) in The Battle of th Labyrinth, and when he outsmarted Chrysaor, by utilizing his crew's fear of Dionysus to his advantage in The Mark of Athena. In The Lightning Thief While searching for the entrance to the Underworld, they encounter Procrustes. He traps Annabeth and Grover using his signature technique — causing them to lie down on a bed while being stretched by ropes until they are exactly the same height of the bed — until Percy tricks him into lying down on one such bed. Procrustes is killed, and the trio proceed to DOA Recording Studios. In The Titan Curse Following advice from Apollo, Percy Jackson found Nereus on the docks of San Francisco, California, after dressing up in old clothes found by Zoë Nightshade. As Nereus is tired of being sought by demigods for answers to their questions and just wants to be left alone, Percy has to catch him long enough to ask one question. However, Percy tricked Nereus into jumping into the water with him holding on, making Percy stronger and overpowering him. During the fight, Nereus shape-shifted into different types of animals, including a seal, a killer whale, and an eel to shake off Percy's grasp. However, his tossing and shape-shifting didn't work well leaving Nereus confused as to why Percy didn't drown at all, and Percy revealed that he was a son of Poseidon, much to Nereus' dismay. He eventually conceded the struggle and agreed to answer the heroes' question. Percy asked him for the location of the monster that Artemis, goddess of the moon and the hunt, had been tracking. Nereus said that the question was too easy and simply pointed to the Ophiotaurus, the creature that had been following Percy and his friends during the events of their quest. In Percy's confusion, Nereus changes into a goldfish and escapes into the sea.
- Omniscience (possibly):Given how Nereus knew things that were unknown to even the Oracle of Delphi, as well as his ability to give accurate answers to any questions that his captors could pose, it is possible that he knew everything and anything indefinitely. In The Crown of Ptolemy Percy finally understands that Setne acts by looking into his enemies minds, finding something he can relate to and use it against. Setne tried and failed to get a handle on Percy's motives for turning down immortality in the past and thus couldn't find anything to relate to get past Percy's defenses.In The Sea of Monsters Percy uses the pool to send an Iris message to Dionysus at Camp Half-Blood, tricking Luke into revealing the fact that Chiron was framed for the poisoning, resulting in Chiron being rehired. In The Singer of Apollo Percy lies, claiming they're not worthy of his music and might explode. Apollo buys the excuse and leaves with the celedones for his concert in a flash of light. Apollo being the god of truth in all. Percy was the first to recognize the weirdness of the lotus casino in The Lightning Thief. Percy forced Gaia to choose between him and Phineas the seer in The Son of Neptune.
- Empathy Link: Percy has a psychic connection with Grover called an empathy link. In The Son of Neptune, Don the faun said that Percy had an Empathy Link with another faun who is Grover.
- Will Power: Percy is shown to have great willpower as he held up the weight of the sky for a long period time and endured the sufferings of Tartarus.
- Leadership: Percy is a natural leader as he led Camp Half-Blood to victory numerous times. Carter Kane had even noticed his leadership.
- Curse of Achilles (formerly): After bathing in the River Styx, Percy was given supernaturally superior speed and strength as well as invulnerability except for his vital spot opposite of the navel. With the Curse of Achilles, Percy's own combat skills are enhanced to the point where he can single-handedly tear through entire armies as well as gods like Hades and Titans like Hyperion (albeit he had some help in defeating Hyperion). He was even able to hold his own against Kronos for a rather long period of time though the titan was only on a fraction of his full power. He later loses it by touching the Tiber river as it was a Greek blessing and he could not enter Roman territory with the curse.
- Wolf Stare: During his training with Lupa, Percy mastered the "Wolf Stare" that says "No matter how bad you think you are, I'm worse," which is so intimidating it allows him to scare off gangsters.
- Eye of Horus Symbol: Percy has an image of the Eye of Horus drawn on his palm, which can allow him to summon Carter Kane wherever he is just by speaking his name, though Percy can use it only once. Percy used this to get Carter and Sadie to Governors Island to help him and Annabeth face off against Setne.
|“||Not that powerful, eh? Could have fooled me. You're the son of the Earth-shaker, lad. You don't know your own strength.||”|
As a son of Poseidon; one of the Big Three, Percy is an extremely powerful demigod, being considered to be the most powerful demigod in Camp Half-Blood. Hazel had considered Nico di Angelo the most powerful demigod she knew until she met Percy, now believing that Percy's power rivaled Nico's and Jason's abilities. Nico later states that, even compared to the rest of the Seven Heroes of Olympus, Percy is the most powerful demigod he has ever met. Both through his father's authority and his own inherent power, Percy's abilities include:
- Water-Induced Abilities: When in contact with or in the presence of water, Percy gains a disproportionate amount of superhuman clarity, strength, speed, agility, and endurance equaling a god. While in this state, he was strong enough to snap Clarisse's electric spear "like a twig," and managed to contend with the war god Ares. In The Lightning Thief, He was able to successively disarm Luke, the most skilled swordman at Camp Half Blood for the last three hundred years in the Camp Half-Blood swordsmanship class with a complex maneuver after he'd doused himself in water. In addition, after Percy was pushed into the creek during Capture the Flag, he effortlessly defeated four children of Ares in rapid succession, including Clarisse, with ease. In The Sea of Monsters, Percy managed to shear off a portion of Luke's shield once enhanced by water, demonstrating godlike strength. However, this only lasts for a limited amount of time unless he is completely submerged in water. He also heals himself from any wound and most poisons when he comes into contact with water, the amount of water and time needed for the healing being proportionate to the severity of the wound.
- Hydrokinesis: With the power of the sea within him, Percy can control every form and great volumes of water, being even able to summon and heal his wounds and cure himself of most poisons with it. Percy can control water to a very high degree, letting him control 10,000 gallons of water in The Demigod Files, but not near omnipotently as previously stated here. He can control it in order to make it explode, or use it to grab something. Percy can summon waves that can easily sink ships. His hydrokinesis abilities include:
- General Hydrokinesis: He can create water from petrified seashells, as well as being able to create water with his own energy and summoning the "force of the ocean" to his will, as long as he concentrates hard enough. He can also harden water into an almost solid shape.
- Water Solidification: Percy can harden water into an almost solid shape. He can use this power to walk on water, by increasing the surface tension of the water to the point where it is solid enough for him to stand on, and water constructs. So far, he has demonstrated creating a strong water shield, and on two instances in The Son of Neptune, he hardened the water into giant hands that followed and imitated the movements of his own hands.
- Water Propulsion: He can control the water around him to propel himself through water. Percy can shoot water, not only from being in water, but he can blast the own water he creates.
- Hydrogenesis: Percy can create water from his own power, though it takes much of his energy for him to do so. Percy did this while at Mount Saint Helens, creating water out of nothing to cause a volcanic eruption, which was powerful enough to cause half a million people to evacuate, and caused ash to fall as far as Lake Tahoe and Vancouver. He also uses this skill while creating his own personal hurricanes. While traveling on the Argo II during The Mark of Athena, he presumably used this ability while combining his powers with Jason Grace's to create powerful storms.
- Toxikinesis (limited): Percy can control and manipulate poisons, as seen when he beats Akhlys in Tartarus in The House of Hades, as well as deflecting Polybotes' poison that was thrown at him in The Son of Neptune. This is limited, though, as poison is only part water. The full extent of this power is unknown although he is able to control it well enough, when angry, to the point of terrifying Annabeth who even asks him to stop. In The Blood of Olympus Percy tried to divert the poison Polybotes attacked him with, but did not due to his fear of this power.
- Cryokinesis (limited): Percy can use cryokinesis to a small degree. He is able to use the ice and snow around him to make an icy hurricane, as he does during the battle in Alaska in The Son of Neptune. He can also manipulate frozen or icy water around him, demonstrated during his interrupted fight with Thalia in The Titan's Curse.
- Vitakinesis (limited): Since he is the son of Poseidon he can heal most wounds and cure most poisons when in contact with water.
- Water Immunity: Percy can fall from great heights into water, and is unaffected by any amount of water pressure. He does not get wet if submerged in water, unless he wants to. Percy can dry items underwater (as long as he holds onto it), such as a lighter.
- Heat Resistance: As a son of Poseidon, Percy has a far higher than normal resistance to heat and burns, similar to that of a Cyclops, due to his father's oceanic nature. In The Lightning Thief, he manages not to drop his sword when Alecto wrapped her fiery whip around his wrist. In The Battle of the Labyrinth, he was able to survive being engulfed by lava thrown by the telekhines, though it began to get more painful the longer he was in contact with it, as well not being killed by the super-heated steam from the eruption of Mount Saint Helens.
- Underwater breathing: Percy can breathe underwater and diffuse the oxygen in the water to create oxygen bubbles that allow his non-hydrokinetic friends to breathe underwater. However, in The Last Olympian he was unable to breathe in the River Styx.
- General Hydrokinesis: He can create water from petrified seashells, as well as being able to create water with his own energy and summoning the "force of the ocean" to his will, as long as he concentrates hard enough. He can also harden water into an almost solid shape.
- Atmokinesis (limited): Percy can summon hurricanes and other types of storms, but the extent to which he can control them is as of yet unknown. Percy's hurricanes have been shown to be powerful enough to douse the fires on Hyperion's body, leaving the powerful Titan vulnerable to attack. By the events of The Son of Neptune he is able to sustain the storm with less effort than his first use of the skill against the Titan Hyperion, although it still drains him over time. He was also able to use it to knock a giant crocodile off it's footing.
- Electrokinesis (limited): Percy used this skill unintentionally on one occasion, while creating his own miniature hurricane to fight Hyperion. Sparks of lightning appeared as his hurricane increased in power. His control of this ability, however, is far less than that of a child of Zeus and appears to be a limited side effect of his storms.
- Aerokinesis (limited): Percy can summon strong winds, which he could use to create storms such as hurricanes and typhoons.
- Geokinesis: Percy can generate earthquakes and (consequently) cause volcanic eruptions, but his control of this technique is less than that of a child of Hades.
- Communication: Percy has divine authority over his father's subjects. He can talk (normally and telepathically) to equines and sea creatures who mainly treat him with deference and lordly respect. He can also speak to other children of Poseidon underwater (seen in The Sea of Monsters, in a conversation with Tyson).
- Zoolingualism (limited to Equestrians and Marine Life): He can understand and talk to marine animals, horses and similar creatures.
- Watercraft Manipulation: Percy possesses an intimate awareness of any ship he is on (sailing ships, canoes, motorboats, possibly submarines); being able to telekinetically operate one (as well as anything related to the ocean)
- Perfect Bearings: Percy has perfect bearings on the ocean, so he can easily navigate his way at sea.
- Mist Control (limited): It was revealed in Percy Jackson and the Singer of Apollo that Percy can control the Mist, as shown when he made a police officer look at an imaginary line of limos to distract him. Though Percy can indeed control the Mist, he is not an expert at it and his power over the Mist is inferior compared to those of Hazel Levesque and children of Hecate. It is implied in the Lightning Thief that he may have a capacity for magic, with him using an evil ward to send Gabe Flying before even realizing his demigod heritage.
In The Crown of Ptolemy Percy temporarily hosted the goddess Nekhbet and gained several abilities while doing so. He lost those abilities when Nekhbet left him, but the abilities he displayed while hosting the goddess included:
- Enhanced Strength: The kopis Percy was wielding felt heavy in his hand except while he was hosting Nekhbet.
- Surveillance Magic: Percy was able to see into the Duat with Nekhbet's "super vulture senses". This allowed him to see magical auras and allowed him to see what Setne was doing to the Duat. However while Carter was wearing Annabeth's Yankees Cap Percy couldn't detect him.
- Vulture Avatar: Percy could summon a giant glowing purple vulture around himself. He used the avatar to fly and to hold onto Setne while flying. The avatar was also able to protect Percy from Setne's attacks.
- The Minotaur's Horn, he obtained this when he killed the Minotaur after it supposedly killed his mother, Sally Jackson.
- Anaklusmos (Riptide in English), made of celestial bronze, given to him by Chiron to fight monsters. When uncapped, it becomes a 3 foot tall double-edged celestial bronze sword and causes the fear of most monsters around it. Riptide is usually kept as a ballpoint pen when not in use, and it will always return to Percy's pocket. It used to be the weapon of Hercules, who got it from Zoë Nightshade. In Last Olympian, Riptide can deflect blasts from Hades. When combined with his hydrokinetic powers and Curse of Achilles, Riptide becomes an "arc of pure destruction."
- The 12th Legion's Eagle, Percy seized the Eagle from the undead army of the frozen Roman Camp on the Hubbard Glacier during The Son of Neptune. He later used it during the battle at Camp Jupiter, where he used its lightning to destroy hundreds of monsters before passing it to Dakota.
- Medusa's Head, Percy received it at the end of the first book. He cut it off and sent it to Olympus, but Poseidon sent it back. Percy, having no need for it left it with his mom, Sally Jackson. His mom uses the head to petrify her abusive husband Gabe and then sells the resulting "statue" as an art piece named The Poker Player.
- Stygian Ice Whistle, a special dog whistle made of Stygian ice that was cooled in the River Styx. It was given to him by Quintus (Daedalus) to summon Mrs. O'Leary and shattered after it is blown once. Percy used it when his friends were having trouble fighting an army of monsters in The Battle of the Labyrinth.
- Wristwatch shield, a wristwatch which turns into a shield, given to him by Tyson. It was badly dented by Dr. Thorn in The Titan's Curse. Tyson came back and fixed it at the beginning of The Battle of the Labyrinth. It was lost later in Battle of the Labyrinth when thrown at Kampê. It was inscribed with the images of the events of The Sea of Monsters, including Percy fighting the bronze bulls, Annabeth killing the Laistrygonian, Tyson riding Rainbow the hippocampus, and Tyson battling the Hydra whilst holding a box of doughnuts.
- Nemean lion's pelt, obtained in The Nemean Lion Skirmish, when he planned the death of the Nemean Lion. He sacrificed it to Poseidon in The Titan's Curse.
- Sand dollar, given to him for his 15th birthday by his father. He splits it in half and gave one half to the Hudson River and the other half to the East River gods to stop Kronos' forces on boats in The Last Olympian.
- Chameleon Armor, he used this in a game of Capture the Flag in the short story of "The Bronze Dragon". It only works from a distance.
- Hermes' multivitamins, these multivitamins make the person who ate it to be immune to nearly any attack, which was used by Annabeth during the Sea of Monsters to turn Percy back into a human after Circe turned him into a guinea pig and prevent Circe from using magic against her.
- The Golden Fleece, used after Annabeth was wounded by Polyphemus, he used the Golden Fleece to heal her. Then it was used to save Thalia's tree at Camp Half-Blood.
- Pandora's Pithos, this was given to Percy by Prometheus to open it and give up hope. Later he gave it to Hestia to look after it, because "hope survives best at the hearth."
- Thermos of Winds, this was used by Percy and Annabeth in the Sea of monsters to escape Princess Andromeda and Charybdis. Given to him by Hermes.
- Poseidon's Pearls, these pearls can transport a person to the sea when smashed. Given to Percy by a Nereid.
- Moonlace, a flower that grows in the moonlight (given to him by Calypso). He planted it at a trough at his apartment, to remember Calypso.
- Javelins, these aren't normal javelins, because they have a grappling hook and an explosive setting. Used in chariot races at Camp Half-Blood. Used first in The Sea of Monsters.
- Daedalus' Wings, stolen in a skirmish in the center of the Labyrinth. Now in a trash can after being thrown away, too damaged for further use.
- Winged shoes, given to Percy by Luke Castellan. In the book, the wings spring out when the wearer says "Maia". Percy gave them to Grover. It was supposed to be a trap from Luke, as the shoes almost dragged Grover into the pits of Tartarus, due to Kronos dragging them in. In the film, he used these to retrieve a pearl.
- Travel Rose, which he used in The Sword of Hades to return to the world of the living after having returned Hades’s sword.
|“||Also, he was reluctant to share his one clear memory: Annabeth’s face, her blond hair and gray eyes, the way she laughed, threw her arms around him, and gave him a kiss whenever he did something stupid.||”|
–Percy about Annabeth, in The Son of Neptune
Annabeth Chase is portrayed in the series as Percy's primary love interest and eventually becomes his girlfriend. When Percy first wakes up in The Lightning Thief, he describes her as a "pretty girl with princess curls."
She nursed him back to health after the Minotaur attack. Annabeth disliked Percy when they first met because their parents Athena and Poseidon have a rivalry with each other. Percy eventually developed a crush on her as they both became fonder of each other. Aphrodite told him that they will have a "tragic love life." In The Mark of Athena, Annabeth admitted that she has had a crush on him since they were twelve. Annabeth also stated that she forgave her ridiculous boyfriend (Percy) for everything he's ever done wrong when she realized he rejected Reyna's love for hers.
Annabeth has kissed him (technically) only four times in the original series. Once, after winning the chariot race in The Sea of Monsters, though that was only on the cheek. In The Battle of the Labyrinth, she kissed him again for luck as she leaves him to fight the telekhines at Mount Saint Helens. Then in the dining pavilion of Camp Half-Blood when Percy was trying to show his feelings towards her prior to all the other campers throwing them in the canoe lake in The Last Olympian and again underwater in the canoe lake which Percy described as "pretty much the best underwater kiss of all time."
Annabeth tells Piper McLean that Percy kissed her good night before he disappeared, in The Lost Hero. Percy mentions in The Son of Neptune that whenever he did something stupid Annabeth would kiss him, going on to say that she must have kissed him a lot, which meant he probably did stupid things a lot. In The Mark of Athena, they kiss many times: once when they reunite, once before Percy, Piper, and Jason leave to meet Bacchus, twice in the stables on the Argo II, once before Annabeth leaves with Piper and Hazel to search for a ghost at Charlestown Harbor, once before Annabeth goes to find the map for the Mark of Athena, once after Percy successfully defeats Chrysaor, and once before they depart (when Annabeth goes on a motorcycle with Tiberinus and Rhea Silvia.
Annabeth Chase was jealous for some time, of Rachel Elizabeth Dare, the clear-sighted mortal girl, because Percy spent a lot of time hanging out with her, but Annabeth eventually befriends her after Rachel became the Oracle. Annabeth has also shown jealousy toward Calypso when Percy arrived back at camp after being marooned for two weeks on Calypso's island of Ogygia.
In The Last Olympian, Annabeth states that Percy looks cute when he's worried. It is also well mentioned that she and Percy have officially become a couple and had been dating for four months before he disappeared a short time before The Lost Hero. When Percy went missing, Annabeth was out of sorts trying to find him (even counting how long it's been up to the minute). In the beginning of The Son of Neptune, Percy's only memory of his past life is Annabeth, but it is "frustratingly dim." As the story progressed, she becomes the first person he remembers fully. When the Argo II approaches, with Annabeth on it, Percy states that "If things went right, today would be the best day ever."
Later, Percy gets furious at Hera when she states that Annabeth is a troublemaker and she will cause the most problems during the quest for Greece and Rome, in which Percy states, "She's the person I want most watching my back," and with a fist of water he smashes Hera in anger.
Percy also sees a possibility of a life of college and marriage with Annabeth while at Camp Jupiter when inside the protected city of New Rome. While they were having those two months of dating they had become closer, romantic and more loving toward each other.
When Luke Castellan was still around, Percy would get jealous about how Annabeth would get protective and caring toward him whenever he was accused. It was Luke, though, who made Percy realize his true feelings for Annabeth in The Last Olympian.
In The Mark of Athena, At the Beginning of the book Annabeth and Percy kiss after so long apart but then Annabeth judo-flips Percy for being gone for so long, the end of the book, they fall into Tartarus holding hands when Percy swears that he will never let her go again. In the The House of Hades, Annabeth and Percy's relationship faces its hardest challenges ever while they try to escape Tartarus. However, they make it through by mostly focusing on the life they want to have together in the future. After escaping Tartarus, their relationship has become stronger with Annabeth knowing that she wants nothing more than to have a happy and peaceful life with Percy, who has begun to seriously think about their future together and even the possibility of having a family. Annabeth also states that she doesn't want to break up with Percy because she wouldn't be able to look at the sea without getting reminded of her broken heart.
|“||She would always be my biggest what if.||”|
–Percy about Calypso, in The Battle of the Labyrinth
Calypso and Percy first met when Percy was stranded on her phantom island of Ogygia. Calypso had healed Percy after he was severely weakened at Mount Saint Helens. Percy later learns that the immortal Calypso was condemned to live on the island forever after supporting her father, Atlas. She asks him to join her and live with her forever where he would become immortal, but he turns her down, even though it would save him from the prophecy (if he had stayed on the island, he would never turn 16). Calypso was in love with Percy, and he somewhat loved her as well. Percy considered her more beautiful than Aphrodite, "but I wouldn't say that out loud or she'd blast me to ashes,". In The Last Olympian, Percy requested that the Olympians show leniency to the Titans who did not support Kronos, freeing Calypso from her prison. Percy has even stated, that for as long as he lived, she would always be his biggest "what-if". It was revealed that Hera sent Percy to Calypso so she could heal him, while the Fates allowed Percy on the island as he was the kind of person Calypso couldn't help but fall in love with. However, like all other heroes that land on her island, Percy had to leave her, which too was part of her punishment.
In The House of Hades, Calypso reappears. It is known that, when Percy made the gods swear to free her from her prison, she was forgotten, staying trapped on Ogygia. She blamed the gods for this, but also Annabeth, as she thought it was Annabeth's fault she was alone. Although she cursed Annabeth for it, Percy did not blame her but instead blamed himself for not ensuring that the gods freed her from her island.
|“||I found myself calling on Rachel a lot, I needed to remember that the mortal world was still out there.||”|
–Percy about Rachel, in The Last Olympian
Rachel Elizabeth Dare is Percy's only human love interest. Before The Last Olympian, Percy notes that he spent a great deal of time with Rachel. He stated that while he was in the mortal world, he could always call Rachel and she'd be there so they could hang out together. In the beginning of The Last Olympian, the two are seen on the beach in Paul’s Prius driving around. Percy says it was as if his dad were keeping the sea nice, just for them. While they are alone, Rachel admits her feelings in the form of a hypothetical question. However, Beckendorf and Blackjack land on the hood of the car before Percy is able to answer (though he remarks to himself that he felt like one of Apollo's sacred cows—"dumb, slow, and bright red"). After he gets up to leave, Rachel kisses him anyways and tells him to go save the world. It is unsure what Percy's exact feelings for Rachel are, as he never openly states them (though, this may be because of Aphrodite making it hard for him, as she said she would because she likes him). Later on Olympus, Rachel tells Percy that she was drawn to him due to his introducing her to the Olympian world, but that they could never be together as she is meant to become the new Oracle (he thinks she dumped him, "which kinda stunk since we were never dating in the first place"). In the end of The Last Olympian, Rachel and Percy are now simply good friends.
|“||Won't change anything, you're still my best friend.||”|
–Percy to Grover, in The Last Olympian
Grover Underwood and Percy have been best friends since they were in middle school in Yancy Academy. At the time, Percy would protect him from bullies and others that would pick on him, but he was not aware of Grover being a satyr. Grover is also the one who helped Percy to get to Camp Half-Blood and helped him on his very first quest in The Lightning Thief. Their friendship is as deep as any of Percy's relationships (excluding Annabeth, his girlfriend) as shown in The Sea of Monsters, when he saved Grover from being killed by the Giant cyclops Polyphemus and Grover establishing an Empathy link that connects them emotionally allowing him to know if the other is in danger and what their feelings are (such as when Percy got done talking with Aphrodite and Grover knew that she and him were talking about his love life). Grover had all the satyrs looking for Percy when he vanished in The Lost Hero.
Thalia Grace and Percy first meet at the ending of The Sea of Monsters when she was turned back into mortal form with the Golden Fleece, introducing herself as the daughter of Zeus. As a daughter of Zeus, Thalia was always looked at when in difficult situations, taught to master more complex skills, such as playing with the mist, making Percy feel rather intimidated by her. During The Titan's Curse, their relationship becomes a love-hate relationship that a brother and sister would have, even going as far as fighting with their elemental powers. By the end of the quest however, Thalia considers him a friend, showing him this when she hugged him after she joined the hunt and became a Hunters of Artemis, stating "I am honoring a friend." Annabeth once stated that Percy reminded her of Thalia a great deal, and that they would either have been best friends or strangled each other.
In The Sword of Hades Percy and Thalia travel to the underworld together. She expresses great concern for him throughout the ordeal. Once it's all over she invites him to lunch and they go for cheeseburgers together. During the Titan War, she and the other Hunters aided Percy and Camp Half-Blood. She also once again decided to make lunch plans with him and Annabeth after the war was over, should they all live through it. During The Lost Hero, Thalia is sent by Artemis to search for him and was worried for his well-being showing, that they still have a strong friendship together.
Percy and Leo first meet in The Mark of Athena, but Percy saw images and visions of Leo during The Son of Neptune. They're not particularly close and haven't gotten to know each other well yet, as Percy was initially angry at him for shooting on Camp Jupiter. When Percy was mad at him, Leo was scared, as he recognized the look that reminded him of the times Jason summoned lightning. The two have also shown the same sense of sarcasm and, at times, a degree of ignorance. At the end of The Mark of Athena Leo is filled with guilt because he thinks opening Nemesis's fortune cookie was the reason Percy and Annabeth fell into Tartarus, in spite of Hazel and Nico's objections. Leo then vows to do whatever it takes to rescue Percy and Annabeth from Tartarus, despite thinking someone would have to stay in there to close the Doors of Death from both sides.
In The House of Hades, after meeting Calypso, Leo becomes quite angry and resentful at Percy for seemingly abandoning her, as well as somewhat jealous, since Calypso clearly still had feelings for Percy (which made things "ten times worse" for Leo). Ultimately, however, Leo is the one to save Percy and Annabeth by flinging a screwdriver at the Doors of Death, managing to open them just in time.
By The Blood of Olympus they've finally gotten to know each other somewhat. Leo admits to feeling awkward hanging out with Percy, since he wasn't sure what kind of small talk to make with a recent survivor of Tartarus. He admits that Percy and his impressive powers had been intimidating enough before, with Leo having trouble of even thinking of Percy as part of the same camp as him, since the two of them had never been at Camp Half-Blood at the same time. The only things the two of them had in common are their silly senses of humor and Calypso, and every time Leo thought of the latter, he wanted to punch Percy in the face. He had wanted to discuss the subject with Percy for days, yet the timing had never seemed right, and the subject had gotten harder and harder for Leo to broach as the days went by. They finally manage to talk about it while attempting to fight Nike and her minions. Percy admits to feeling bad about Calypso, feeling that he's failed her, recalling how he'd experienced Calypso's grief after seeing her curse on Annabeth take effect. Percy admits to his mistake without making excuses, admitting that he should have made sure that the Olympians had kept their promise to free her. He is happy about Leo finally finding her, and promises that if he and Leo survive the ordeal at hand, that he'll do anything he can to help Leo find a way back to her, insisting that this is a promise that he will keep. As a result, Leo is finally able to let go of his anger for the son of Poseidon, admitting that he "just couldn't dislike the guy" any longer, due to the latter's sincerity, and is calmed by the confirmation that Percy didn't return Calypso's past feelings.
The two are shown to be very friendly around each other after that, with Leo even nicknaming Percy "Aquaman", much to the latter's chagrin, and also teasing Percy about his Zodiac sign being a Leo. Like the others, Percy is devastated at Leo's death in The Blood of Olympus, and remains hopeful in the possibility of Leo still somehow surviving.
When Leo finally returns in The Hidden Oracle, Percy is so overjoyed to see him, that he, unlike most others, embraces Leo without even punching him.
Some of the things Leo and Percy have in common is a goofy sense of humor, them both having traveled through the Sea of Monsters and encountered Polyphemus, and them both having been marooned on Ogygia, becoming a love interest of Calypso in the process.
|“||At this point, I was ready to stick the kid in a meat-flavored sack and throw him to the wolves.||”|
–Percy about Nico, in The Titan's Curse
Nico di Angelo has the ability to annoy Percy Jackson quite easily when they first met by asking Percy several questions in The Titan's Curse. However, after they go on a quest with his sister, Bianca di Angelo, he understands more about his past. After Bianca dies, it is Percy that decides to break the news to Nico. Nico takes it very hard and begins to hate Percy, blaming him for his sister's death before running away from camp.
During The Battle of the Labyrinth, Percy has dreams about Nico and feels bad for him. While searching for Daedalus in the Labyrinth, Percy runs into Nico at the Triple G Ranch. He completes a job for Geryon to free Nico, even at the risk of Percy having to stay there himself if he fails. Even though Geryon double-crossed Percy, after his defeat, Percy asks Nico to stay on the ranch to keep him safe. Nico begins to open up to Percy more and rushed into the Labyrinth again after King Minos told him Percy was in danger. During the quest, Nico saved Percy many times, especially when Kronos first rose from his sarcophagus in Luke's body; creating a large wall of black rock between them. He even aided Percy when the Titan Army began to attack Camp Half-Blood, but refused to stay. When Nico arrived at Percy's house with a plan to help defeat Kronos, Percy invited him instead and offered him some of his birthday cake.
In The Last Olympian, Percy and Nico have a short falling-out. In order to gain information on his mother, Nico lead Percy to the Underworld to unknowingly speak to his father, Hades. Hades double-crossed Nico and put Percy in his dungeon. Percy becomes angry at Nico for a while, even after Nico saved him and helped him bathe in the River Styx. During the Battle of Manhattan, Percy asks Nico to get his father to help, as Nico is the only one that can; even though Nico wants to stay and help in the battle.
In The Son of Neptune, Nico meets Percy (who has no memory of his past), but says they have never met because Percy needs to find his own way. When Percy does remember Nico later, he becomes angry all over again, stating that he was going to strangle Nico. During The Mark of Athena, Percy never gives up on finding him, and tries hard to free Nico before he runs out of air. When Percy sees Nico's state, he doesn't scold or reprimand him as he had planned. After saving him and almost falling into Tartarus, Percy trusts Nico to lead the other Heroes of Olympus to the Doors of Death on the mortal side so they can meet.
In The House of Hades, Percy realizes that Nico indirectly saved his and Annabeth's lives by reminding Iapetus also known as Bob that Percy is a friend even though Percy didn't visit him and Nico was the one who actually visited him in Hades palace. Percy, when on the verge of death from Gorgon blood, admits that Nico is another friend that he had not treated fairly. It is revealed, that Nico is homosexual, and claims he had a crush on Percy, although Nico denies he no longer does. Percy himself knows nothing of these feelings and doesn't return them, though he does care for him like a brother. After returning from Tartarus, Percy comes to thank him for keeping his promise and tries to pick up their tattered friendship, Nico, afraid of his feelings, asks Percy to give him space and leave him alone, much to Percy's confusion and hurt.
At the end of The Blood of Olympus, after Gaea and the Giants' defeat, Nico finally works up the courage to tell Percy and Annabeth about his crush on Percy, and is genuinely happy for them. Percy is stunned as he was genuinely oblivious to Nico's feelings for him.
|“|| Clarisse: When you, uh, had that vision about your friends…|
Percy: You were one of them. Just don’t tell anybody, okay? Or I'd have to kill you.
–Clarisse and Percy, in The Demigod Files
Clarisse La Rue and Percy have a rough relationship. Clarisse dislikes Percy at first for dousing her in toilet water when he first arrives at camp (even though she was trying to dunk his head in the toilet). She later learns that Percy beat her father, causing her and her cabin to dislike Percy even more. They manage to grow a bit closer in The Sea of Monsters when Percy manages to free her from Polyphemus (the two were even able to work well together) and sends her ahead with the Golden Fleece, a gesture she greatly appreciates. During The Demigod Files, Percy helps Clarisse get her father's chariot back and has a vision of his friends in danger. When Clarisse asks if she was one of the people he saw, he says yes, but not to tell anyone. While the two can at least stand each other by the end of the original series, they do have great respect for the other.
|“||Boys, I'm sure you both would've been wonderful at killing each other. But right now, you need some rest.||”|
–Annabeth to Jason and Percy, in The Mark of Athena
Jason and Percy have first meet in The Mark of Athena and have been shown to be on good terms. Percy says that Jason "thinks the same way he does" and mentioned a "spark of friendship." They both share many similarities: both are sons of one of the Big Three and extremely powerful demigods; both are excellent swordsmen; both are leaders at their respective camps; both hate Octavian; and both were chosen by Hera to be switched in order to bring the seven Heroes of Olympus together. Annabeth Chase calls their growing relationship a "budding bromance." While fighting Otis and Ephialtes, the two are able to work well together, and they both feel regret about being forced to fight each other by eidolons. It is also shown that when working together their powers get more intense when they created a huge storm at Fort Summer, while fighting the Romans.
The two also have a bit of a rivalry. After the two were possessed and forced to attack each other, Jason apologizes and says that he could have killed him, which Percy quickly turns around and says he could have done the same. Also during a meeting, both Percy and Jason go for the chair at the head of the table and Jason's hand gives off sparks. The two have a silent standoff until Annabeth ultimately takes the seat.
After Percy examines himself and his fatal flaw, he realizes that he feels responsible for everyone on board, including Jason. Because of this, while they are at sea he gets nervous when it is Jason's turn to take watch and feels like he should be the one to protect everyone.
After returning from Tartarus in The House of Hades, Jason is the first one to give Percy a bear hug.
All throughout The Son of Neptune, Percy and Hazel remain very close friends. When Percy first arrives, he saves her and Frank's lives. After, Reyna tells Hazel to show Percy around Camp Jupiter and takes him to Octavian to see whether or not he should join the legion. During evening muster, Hazel says she will stand for Percy, making him a part of the Fifth Cohort. Once, Hazel saved Percy from drowning in quick sand by Gaea. During times of distress or confusion, Percy and Hazel comforted each other and gave advice in a sibling manner. Percy also stated that Hazel was too important to him and wouldn't let anything happen to her. Hazel even kisses Percy on the cheek, even though Percy claims it was a total sisterly kiss. Also, in The House of Hades, Hazel stated that Percy was probably the demigod she admired the most, along with her brother.
Percy and Piper have first meet in The Mark of Athena, but they are not particularly close and haven't gotten to know each other well yet. Piper seems to think of him as a troublemaker and can see why Annabeth likes him, but feels slightly unimpressed with him after hearing so many stories about him and after comparing him to Jason. She also expected Percy to look more muscular. Despite this, Piper has shown content having either Jason or Percy being the "leader" of the seven. Piper technically saves his life twice during their quest for the Athena Parthenos and Nico di Angelo. Percy is shown at least twice having faith in Piper's charmspeaking abilities. Percy also shows concern for her by checking up on her after she hurt her shoulder.
Reyna was bitter towards Percy at the beginning of The Son of Neptune as Percy destroyed Hylla's and her home at Circe's spa but gradually began to warm up to him as the book went on. She interrogates Percy and throughout the encounter she implies that they've already met. It is later revealed that she once lived on Circe's Island, where Percy and Annabeth unleashed a crowd of pirates, resulting in her and her sister being taken captive. She asks Percy to consider taking Jason's place as Praetor and they could be "friends." Percy seems to feel that Reyna is hinting that it could result in the two of them being romantically involved. He declines Reyna's offer, stating that he already has a girlfriend. Near the end of The Son of Neptune, Reyna smiles when Percy arrives in battle. During the battle, when she sees her sister Hylla, she glances at Percy with a look that says, I could hug you right now.
Zoë Nightshade is the daughter of Atlas. At first she did not like Percy, but then she came to respect him after it was his plan that helped defeat the Nemean Lion, even giving Percy the pelt after the fight even though it was Zoe who finally killed the lion. During the quest, Percy learned more about Zoë's past while having dreams, learning that Hercules had betrayed her after she gave him Riptide. He realized why Zoë seemed to resent all heroes, but in the end, she told Percy that he was nothing like Hercules, and that she was wrong about men. Percy even comes to appreciate a lot of Zoë's good qualities as they spend more time together. Before Zoë's death at the hands of her father, she compliments Percy by saying that he is nothing like Hercules (who betrayed her), and deserved Riptide. After she died at the top of Mount Othrys, Artemis transformed her into a constellation named 'the Huntress' after her death by Artemis, as Zoë is part of the Hunt.
Percy still remembers her from time to time, as he saw her constellation when on Calypso's island, as well as remembering her sacrifice in The Son of Neptune, despite having no memories of his past at the time.
Bob the Titan, originally Iapetus, became Percy's friend after Percy threw him in the Lethe, wiping his memories. He rescued Annabeth and Percy in Tartarus, and stayed behind at the Doors of Death to sacrifice himself so that Percy and Annabeth could escape. Some of his last words to Percy and Annabeth were, "Say hello to the sun and the stars for me."
|“||I am your trainer, your teacher. That is not the same as being your leader. I will go gather what allies I can. It may not be too late to convince my brother centaurs to help. Meanwhile, you called the campers here, Percy. You are the leader.||”|
–Chiron to Percy, in The Last Olympian
Percy has a deep respect and love for his Centaur teacher Chiron, as he helped him as "Mr. Brunner" when he was still attending Yancy Academy and has helped him try to clear his name when he was blamed for being The Lightning Thief. Chiron in return shows a deep love for Percy as that of like a son and became pained when he was missing in The Lost Hero, having almost raised Percy into a young man himself in a way of that a teacher would train and raise their student.
Blackjack is Percy's pegasus and his loyal friend. While on the Princess Andromeda in The Sea of Monsters, Blackjack was captured and was planned on being recruited into the Titan Army, until Percy set him free. After that, Blackjack became Percy's personal steed and came whenever Percy needed him. Blackjack will also come whenever any sea creature needs Percy's help, normally in the middle of the night (much to Percy's annoyance).
After Percy went missing in The Lost Hero, Blackjack is one of those mentioned to be out looking for him.
Blackjack appears in The Mark of Athena where he stops the fight between Jason Grace and Percy Jackson, who had both been possessed by eidolons, by knocking Percy on the back of his head with his hoof.
Mrs. O'Leary is Percy's pet hellhound, whom he received from Daedalus before he died in Battle of the Labyrinth. Despite being rather large, even by hellhound standards, Mrs. O'Leary is incredibly friendly toward Percy, licking him anytime they meet. Mrs. O'Leary is very protective of Percy or any of his friends, normally aiding in battles by attacking enemy monsters. In fact, just Mrs. O'Leary's bark and size are enough to frighten other monsters.
Percy is also very protective of Mrs. O'Leary. When Percy was in the Underworld with Nico and Mrs. O'Leary, he called her off when Nico betrayed him because he didn't want his dog being hurt by the Furies. Despite Mrs. O'Leary being angry with the order, she still obeyed. Mrs. O'Leary and Tyson search for Percy together after he goes missing, eventually finding him at Camp Jupiter and helping fight back the Giant Army.
|“||Mom; Hey, I’m alive. Hera put me to sleep for a while, and then she took my memory, and…Anyway, I’m okay. I’m sorry. I’m on a quest—I’ll make it home. I promise. Love you.||”|
–Percy leaving a message for Sally, in The Son of Neptune
Percy loves his mother, Sally Jackson, dearly. He always wishes to make her happy and would do anything to keep her. He is very mindful of her safety, even considering to sacrifice himself for her once. He also left the moonlace from Calypso's Island under her care. In The Son of Neptune, after failing to communicate with Annabeth, he leaves her a phone message letting her know he is safe.
Sally also cares deeply for her son. She worries about him any time he is on a quest and cried with Annabeth Chase when he went missing. When he returned home from the quest to defeat the giants, Sally is shown to be somewhat sterner with the son of Poseidon; albeit somewhat playfully as shown when she refused to give him cookies before he heaves to take Meg and Apollo to camp.
Despite Percy always looking for his mom's permission and approval as he gets older, Sally realizes that Percy is getting too old to always listen to her and tells him to do what he thinks is right.
|“||The way our sons and daughters act in our names… well, it usually says more about them than it does about us. And you, Percy, are my favorite son.||”|
–Poseidon to Percy, in The Battle of the Labyrinth
Poseidon and Percy have a complicated relationship. Percy has a strong admiration and pride for his father, though he initially resented him as he felt he had abandoned him and his mother. Percy let go of this when he learned his father cared for him. Though Percy has met his father only occasionally, he cares very much for his approval and greatly respects him. Poseidon in turn holds a fierce pride for Percy, once calling him a hero greater than Hercules, and claiming him to be his favorite son.
An important memory for Percy before he knew he was a demigod was of Poseidon visiting Percy when he was in his cradle in a warm glow and a warm smile. Despite caring for his father, Calypso makes him wonder if he only fights for the Olympians because Poseidon is his father. Percy hasn't been contacted by Poseidon at all after the events of The Last Olympian.
|“||Sally, I can't claim to know what you and Percy have been going through all these years. But it sounds to me... it sounds like Percy is doing something noble. I wish I had that much courage.||”|
–Paul to Sally, in The Last Olympian
Percy was at first wary of Sally's new boyfriend, Paul Blofis, but eventually warms up to him. Percy is very happy to have Paul as his stepfather when his mother gets married to him. During the Battle of Manhattan, Percy showed just as much concern for Paul as his mother when he found them under Hecate’s spell, showing how he has come to see Paul as family in such a short period of time. Interestingly, both Percy and Poseidon at first mispronounce Paul's name as "Blowfish."
Percy first met Tyson when they were attending the same school together, Percy was his friend and stood up for him against bullies. Percy loves his half-brother Tyson, but couldn't believe they were related when Poseidon first claimed him. He was also kind of ashamed to have a monster for a brother, thinking that his father was trying to make fun of him and that Poseidon gave him no warning about Tyson. Despite this, he still got angry with Annabeth when she called Tyson a monster, stating that he wasnt a bad person. His resentment and embarrassment disapears after Percy thinks Tyson died when the CSS Birmingham exploded (with Tyson in the engine room). He feels regret for how badly he treated Tyson before and wishes he could take it back. When Tyson turns out to be alive, Percy fully accepts him as his brother. He and Tyson have gone on many adventures together, and Tyson always looked up to Percy as his older brother. Tyson even used his knowledge of the forge to make a wristwatch that transforms into a shield for Percy. The shield is decorated with images of their adventures engraved upon it, but it was later lost in the Labyrinth. Tyson revealed that he had prayed to Poseidon for a friend, and he had sent him Percy.
Percy hated his former stepfather. When he was young, he called his stepfather "Smelly Gabe" because he smelled like old pizza wrapped in sweaty gym shorts due to his cigars and non-bathing habits. Sally uses Medusa's head given to her by Percy to turn him into a statue. She sells him and he is currently on display in an unknown museum.
|“||You singlehandedly took out three basilisks while I was sipping green tea and wheat germ. You held off an army of Laistrygonians so that our plane could take off in Vancouver. You saved my life by shooting down that gryphon. And you gave up the last charge on your magic spear to help some defenseless mortals. You are, hands down, the nicest child of the war god I’ve ever met… maybe the only nice one.||”|
–Percy to Frank, in The Son of Neptune
In The Son of Neptune, it is found out that Frank Zhang is related to Percy, although Percy would be his Great, Great (a thousand times)... Uncle. Frank Zhang's ancestor, Periclymenus is the relation linking them. While Percy tries to explain this to Tyson, he caves and says they are all brothers. Frank is first introduced when guarding the entrance to the Roman camp, Camp Jupiter. Percy saves his life when the two gorgons who have been following him, grabs Frank by the arms. Before being claimed by Mars, he hopes that Apollo, God of Archery, will claim him due to his excellent archery skills. Though he doesn't want to be related to Octavian. Frank admires Percy as a hero and is in awe with him as he saved Frank's life multiple times. He is also one of the few demigods at Camp Jupiter who didn't bully Frank because of his clumsiness. Percy also likes Frank and calls him a beast after he took out Alcyoneus.
Percy greatly loves his maternal half-sister and volunteers to babysit her. Before she was born, he tells Apollo that one on the reasons he cannot go on a quest with him is because he wants to get to know her.
|“||Percy was almost the same age now as Luke had been then. He could understand how Luke became so spiteful. In the past five years, Percy had been a pawn too many times. The Olympians seemed to take turns using him for their schemes.||”|
–Percy comparing himself to Luke, in The Mark of Athena
At the beginning of the series in The Lightning Thief, Percy thought that Luke Castellan was a cool guy and thought that they would become close friends when he came to Camp Half-Blood. Luke helped train Percy in sword fighting and gave him moral support as a new comer, but at the end of the book it is shown to him that Luke was the real Lightning Thief and summons a pit scorpion to kill him and before he leaves, he tells of his bitterness and revenge against the Olympian gods. In The Sea of Monsters, Percy and Luke fight aboard the Princess Andromeda and it is shown that while Percy was at first confident in his abillity to beat Luke in a duel, he was actually terrified at the prospect of combating Luke in swordplay as he recognised how skilled Luke is. Percy has him reveal that he was the one who poisoned Thalia's pine tree to the entire Camp Half-Blood. When Luke was supposedly killed in The Titans Curse, despite at first showing evident horror at Luke's terrific death, Percy is told by his father that Luke was not dead and that he was alive causing him to become angry and filled with more hate towards Luke. During The Battle of the Labyrinth, Percy witnesses Luke become taken over by Kronos and before that he thrown into a fight against a giant by him. When they go into The Titan War after Kronos has been killed by Luke, he angrily tells Percy with pleading eyes that he didn't want the same thing to happen to the other unclaimed demigods wind up like him and Percy promised Luke that he won't let it happen again and Luke nodded before dying, showing that despite Percy and Luke's mutual hatred for each other, after Luke killed Kronos, their enmity towards each other has toned down. Percy honors that promise to him by saying that as his wish that all the children of all the gods will be recognized and cared about, implying that he still had respect for Luke. Percy also showed signs of jealousy toward Luke because of Annabeth's affection toward Luke (and Percy's growing feelings for Annabeth at the time). During The Last Olympian, Kronos states that Luke feared Percy.
During The Mark of Athena, Percy starts remembering how angry Luke was with the Olympian gods. Then after seeing Bacchus just watch himself and Jason fighting for their lives against Otis and Ephialtes, he understood why. Because of this, he could understand Luke a little better. Percy has apparently completely lost his hatred for Luke.
|“||On the bright side, both Jason and I outrank you, Octavian. So we can both tell you to shut up.||”|
–Percy to Octavian, in The Mark of Athena
When they first met, Octavian was suspicious about Percy, thinking that he's a spy for the Gigantes as he was a Greek. At the end of the book, Octavian disliked Percy because he stole his chances of being praetor. He also accused Percy of leading the Greeks to attack Camp Jupiter (which was actually an accident because Leo was possessed by an eilodon). Percy has grown a strong dislike toward him as he was black-mailing Hazel about where she really came from, even going as far as saying that he would uncap Riptide from his pocket to protect her from Octavian if she gave him a signal.
|“||To show you my thanks, I shall spare your life. I do not trust you, Perseus Jackson. I do not like what your arrival means for the future of Olympus. But for the sake of peace in the family, I shall let you live.||”|
–Zeus to Percy, in The Lightning Thief
Zeus has mixed feelings for his nephew. He was upset over his birth because it violated the pact that he, Poseidon, and Hades made after World War II to not bear any more children, even as he himself did no better by conceiving Thalia and Jason Grace, and was angered by his nephew personally when he refused his offer of godhood so it seemed like being a mortal was somehow better than being a god. Zeus is nevertheless thankful for the demigod's past services to both himself and Olympus as a whole. During the winter solstice council meeting in The Titan's Curse, he voted to let him live even when it was no longer tied to the fate of Thalia. However, Zeus once warned Percy that he will strike him down if he ever travels in the sky. Though it is never brought up again by his uncle, Percy is very mindful of traveling by land or sea. However, it seems that in extreme situations, Percy is allowed to travel by plane as evident in The Son of Neptune. He also allows Percy to fly on Blackjack, and allows him to be carried by the Angel Statues at Hoover Dam.
|“||That means I can smash him to a pulp as often as I want, and he'll just keep coming back for more. I like this idea.||”|
–Ares when Percy was offered immortality, in The Last Olympian
The god of war despises Percy for wounding him during their duel in The Lightning Thief. It is dangerous that they are on bad terms because Ares thinks highly of revenge and is quite violent. Ares puts a curse on Percy's sword which came into effect during the battle with Atlas. When Percy was later offered godhood, Ares agreed with it because he could fight Percy anytime he wanted and wouldn't have to worry about killing him. As Mars, he seems to treat him with a mixture of amusement and annoyance.
Like Zeus, Hades has a mixed relationship with his nephew due to his natural dislike of heroes, also like Zeus he aso disapproved of Percy's existence due to Poseidon breaking the oath. He once believed Percy had stolen his Helm of Darkness and tried to kill him until the boy later proved his innocence and returned the helm which the god repaid by returning the boy's mother whom he had kidnapped. In The Last Olympian, Hades had Percy imprisoned Percy in his dungeon to ensure Nico became the child of the Great Prophecy until Nico released him, to Hades anger. Later, he was convinced by his son to aid Percy and also played an indirect role in his wish for general acceptance and amnesty through past business advice to Nico for getting a "solemn oath." Given that Percy is directly responsible for his position on the council with full privileges and rights, it would be fair to say that Hades has an improved opinion about him.
|“||Do not judge me too harshly, half-blood. Wise counsel is not always popular, but I spoke the truth. You are dangerous.||”|
–Athena to Percy, in The Titan's Curse
Athena is on neutral, if on somewhat unfriendly terms with Percy. She disapproves of his relationship with her daughter, Annabeth both because of his fatal flaw and he is the son of her rival Poseidon. In The Titan's Curse, she guided him at the Hoover Dam in order to save Annabeth though she also suggested it wiser that he be destroyed at the winter solstice meeting. In The Last Olympian, Athena had Hermes send a message to Percy as well as Annabeth, advising how to best prepare for the invasion but also used the opportunity to remind Percy of her displeasure about his relationship with her daughter. Despite her disapproval of him, it was Athena who convinced the other Olympians to honor his request for recognition though she later confronted him about his decision to decline godhood. He admitted Annabeth was the main reason much to her dislike.
During The Mark of Athena, Annabeth pleaded with her mom in the form of Minerva to help her find Percy. Minerva on the other hand hated the Romans, and felt that if Percy had joined them, he should die with them. The fact that Annabeth loved Percy too much to let him go caused a rift between Annabeth and her mother.
Hera neither likes nor dislikes Percy. Both Percy and Annabeth disagree with her views about family, siding with her son Hephaestus even though Hera helped them several times in The Battle of the Labyrinth. Percy is close friends with Thalia, one of Zeus's illegitimate children whom Hera naturally despises. In addition, Percy is the love interest of Annabeth whom Hera cursed for offending her, much like Ares did to Percy for humiliating him. In The Last Olympian, she makes Ares write a thank you letter to Poseidon for saving Olympus, hinting that she may care for him. In The Son of Neptune, Hera sent Percy to Camp Jupiter, have erased most of his memory to her nephew's great annoyance. As Juno she is noticeably more patient with him and answered his questions in his dream without complaint. She commented she considers Percy "a loose cannon" and "impulsive" but also "unswervingly loyal" as well "the glue that will unite the seven". Percy mentions he understands her motives and reasoning for uniting the seven but still is annoyed having lost 8 months of his life as a result.
Both Dionysus and Percy share a mutual dislike of each other. Dionysus detests all heroes in general (although he was once a hero himself) due to Theseus's treatment of his wife Ariadne while Percy resents his antagonistic attitude towards him and the rest of the campers. On the other hand, Dionysus did once save Percy's life during his quest to save Annabeth and Artemis. He also correctly remembered Percy's name in a conversation they had after he saved Percy on said quest (Dionysus is notorious for mixing up and forgetting the names of campers, though they know that he does this on purpose). Then at the end of The Battle of the Labyrinth, Dionysus gives Grover his support after learning of Pan's death and cures Chris Rodriguez of his madness. Despite their mainly tense relationship, Dionysus favors Percy with his advice, aid, and judgement more than any other god in the series. This indicates that Dionysus likely acknowledges Percy, especially after the end of the second Titan War though he did tell Percy he would still try to make his life miserable at camp. As Bacchus, they treat each other the same as normally despite Mr. D being Roman aspect of himself as he helped Percy fight the Twins Giants inside the Colosseum, Rome. He also warns Percy that his future is in extreme danger.
|“||Good-bye, lad. You did well, destroying the telekhines. I’ll always remember you for that.||”|
–Hephaestus to Percy, in The Battle of the Labyrinth
Traditionally, Hephaestus has close ties with Percy's father Poseidon in the form of the Cyclopes who work for both of them. Hephaestus is personally grateful to Percy for having discovered and eliminated those who invaded his forge under Mount Saint Helens even though he not only destroyed the forge but ultimately freed Typhon. Though he was impressed with the boy's performance in the battle for Olympus, he mentions to Leo in The Lost Hero that he sees Percy as an ingrate and upstart for refusing immortality and demanding that the gods pay closer attention to their children.
|“||You did well, for a man.||”|
–Artemis to Percy, in The Titan's Curse
Percy is on Artemis' good side since he helped find and save her in The Titan's Curse. She even declares him a hero before Olympian Council and calls him a man rather than a boy after he helped her defeat Atlas. Percy's friendships with Thalia and Zoe as well as his loyalty to others regardless of gender places him in the highest regard in her eyes. In The Lost Hero, she sent her Hunters in search of him, deliberately defying her father's orders in order to do so. It is unknown but likely that she knows what happened to him. Percy is also one of the few males that Artemis favours.
Percy is on good terms with Hermes who convinced him to go on a quest in The Sea of Monsters and gave him magic items to assist him in his journey. He also explained the relationship between gods and heroes to him. Later, their relationship soured after realizing that Percy could not save Luke Castellan. After the war, their relationship was mended upon Percy's counseling and sympathy for Hermes' feelings of powerlessness for Luke's fate. Hermes trusted Percy enough to seek him out for help in retrieving his stolen Caduceus, and repaid Percy's favor by treating him and Annabeth to a magically arranged dinner in Paris for their one-month anniversary.
|“||Always some monster. But my dear Percy, that is why the others are on this quest. I'm more interested in you.||”|
–Aphrodite to Percy, in The Titan's Curse
The goddess of love and beauty favors Percy, having expressed an interest in his relationship with Annabeth Chase. She told that Percy that she planned to meddle with his love life, intending to make it a "nice tragic love story". It was Aphrodite who arranged for Percy to meet Rachel and later Calypso, causing him to be confused about his feelings for Annabeth.
At the end of The Last Olympian, Aphrodite was one of the gods who voted in favor of Percy being granted godhood. She was also one of the gods who voted not to kill Percy at the winter solstice.
Apollo tends to side with Percy and can see the good he does. While Percy goes on a quest to try and save Apollo's sister Artemis in The Titan's Curse, he helped Percy directly which goes against the ancient laws of gods, but put his faith in Percy that he would be able to save her. Apollo later thanks Percy for saving Artemis. In the The Hidden Oracle, Apollo thinks very highly of Percy, implying that he would rather have him for his master than Meg. The first thing Apollo did after he lost his godhood was to immediately go to Percy's place for help. Apollo brags to Meg about how he taught Percy and is disappointed by the latter's lack of admiration. Nevertheless, Apollo tries to persuade Percy to help him with the quest, but Percy flatly refuses. Percy however agrees to help Apollo in small ways and takes him and Meg to Camp Half Blood. After saving Camp Half Blood from Nero's attack, Apollo goes into despair, but Percy gives him a pep talk on being a hero.
|“||My lord Hades, are you sure we can’t let this little hero go? He’s awfully brave.||”|
–Persephone to Hades about Percy, in The Last Olympian
Percy only met Persephone twice, but he came off worse both times. In The Demigod Files, Persephone tricked Nico, Percy, and Thalia into recovering Hades' new sword. In The Last Olympian, Percy is considered by Persephone to be brave, but she does not vouch for him against Hades and shrugs indifferently when Hades states that he will imprison Percy and make himself king of the gods when Nico turns sixteen.
Aside from his father, Hestia is possibly Percy's best relationship with a god. Percy actually first saw Hestia his first day at camp but thought she was an eight-year-old girl. Hestia helps Percy several times in The Last Olympian which he repays by entrusting her with Pandora's pithos as "hope survives best by the hearth." Percy's respect for her goes as far for him to tell her she is "the last Olympian and the most important".
He is the main antagonist of the whole story, but being the father of the Big Three gods, he is Percy's grandfather. Like Percy said, "Being the son of Poseidon and all, I guess that makes him my grandfather." Percy thought it so strange he dismissed it completely. Nevertheless, Percy is Kronos' grandson. Kronos has tried to recruit Percy several times, but to no avail. Through the Great Prophecy, Percy was the demigod who chose to save Olympus and ultimately defeat Kronos by giving Luke the "cursed blade."
He is the only Titan that is on the good side with Percy. In The Demigod Files, while he is fighting Percy, Percy tricks him into splashing into the River Lethe, wiping his memory clean. He emerges believing he is a man named Bob and his friend is Percy though he finds out that he is actually not later in Tartarus. However, he is presumed dead after fighting the embodiment of Tartarus and ensuring Percy and Annabeth reach the mortal world safely in The House of Hades.
He and Percy have a similar hateful relationship. He and Percy fight and he easily got furious; Percy had a mini-hurricane around him, extinguishing Hyperion's light. Soon, the satyrs' magic transformed him into a tree in The Last Olympian. In The House of Hades, Percy convinces Iapetus to pierce Hyperion's reforming "bubble", and is later annoyed that Hyperion "doesn't stay dead." When preparing to get to the Doors of Death, Percy is afraid that Hyperion might sense his presence, and moves further away from him.
As a Titan, his curse was to carry the weight of the sky on his shoulders. Close to the events of the Titans Curse he succeeded in getting Luke to carry the sky so that he could fight. Then he tricked Annabeth into carrying it, who then got Artemis to take the burden. Percy then relieved Artemis of the sky so she could fight. Finally Atlas ends up with the sky again because of Percy, so it is heavily implied that Atlas hates Percy.
Prometheus and Percy have mixed feelings for each other. Prometheus says he likes heroes because Hercules freed him from being chained to a rock with vultures. Although Percy regards him as "a slimy worm," he becomes more respectable of him after he shows Percy a vision of Hermes lecturing Luke. It is unknown if they meet again, and if they do meet again, it will probably be under better terms as they are now no longer enemies, but it will still be unknown if Prometheus will be assisting the Titans or the gods now.
Percy and the giant Polybotes have a large amounts of dislike for each other, as Polybotes is the Bane of Neptune and has attempted to capture, torture, and eventually kill Percy. According to Polybotes, Percy's blood will bring back the Earth Mother, but before that he wants to torture Percy and keep him as a pet until the time is right. In The House of Hades, Polybotes hates Percy more than ever, and is determined to avenge his death by chasing him all over Tartarus. However, after Percy and Annabeth tumble into the domain of Night, Polybotes refuses to follow them there, and leaves them for dead.
Alcyoneus has respect for Percy, as he has been watching him all his life and knew he was the one to defeat Kronos. However, because of his orders from Polybotes, he apologizes that he will not be able to kill him. Beyond this conversation, the two share no more interaction.
Throughout The Son of Neptune, Gaea, the goddess of the Earth has been sending Percy dreams and speaking to him. While she is speaking to him, she told him affectionately that he was her "important little pawn" and that he would be the ultimate key to the Olympians' defeat. In turn, Percy hates the goddess for her trying to destroy his friends at both Camp Jupiter and Camp Half-Blood, as well as the Olympians, especially as this includes his father. In The Mark of Athena, Gaea personally chose Percy to be her sacrifice for blood to make her raise, she also appears to him in a near like human form calling him her "dear friend" along with her "little darling pawn". She is also very active towards Percy, as she appears to him more than the other Seven, appearing in a human-like form during The Mark of Athena, telling him to enjoy Tartarus and that he will fall to her. In The House of Hades, after Iapetus and Damasen are forced to sacrifice themselves, Percy vows to defeat Gaea and avenge them.
- Main article: Percy Jackson and the Olympians: The Lightning Thief
Percy is portrayed by Logan Lerman. His character's age has been increased from 12 to 16 to appeal to older viewers. Throughout the film, Percy has not been shown to be able to remain dry underwater, or anywhere else either.
- Main article: Percy Jackson: Sea of Monsters
Percy is again played by Logan Lerman.
Video GameIn the video game, Percy appears as the main protagonist. After getting more than three characters, besides Percy, the player may decide upon switching, however, Percy cannot be replaced. His attacks are mostly Water based. He also has a few Physical attacks and one Poison attack. He is resistant to Water but is vulnerable to Poison. The table below contains all the moves he can learn throughout the game.
|Ability Name||Effects||Ability Cost|
|Gale Slash||Physical attack against a single enemy.||4|
|Hero’s Fate||Increase Accuracy for one ally. Increases Teamwork.||3|
|Water Jet||Water damage to a single enemy.||3|
|Sewage Stream||Poison damage against a single enemy, causing Sicken.||4|
|Fly by Slash||Inaccurate, a light Physical attack against all enemies.||6|
|Tropic Wind||Water damage and Weaken vs Fire to a single enemy.||5|
|A Twist of Fate||Increases Accuracy for all allies. Increases Teamwork.||6|
|Eddy||Slow and water damage against a single enemy.||5|
|Deluge||Water damage to all enemies.||8|
|Polar Gust||Chill and Weak vs Water to a single enemy||6|
|Blinding Rain||Water damage and Blind against all enemies.||8|
|Water Trident||Heavy Water damage to a single enemy.||6|
|Trident Strike||Three quick Physical attacks against a single enemy.||7|
|Undertow||Water damage and Slow against all enemies.||9|
|Olympic Blow||Heavy Divine attack against a single enemy.||7|
"Perseus" is a Greek name, spelled Περσεύς in Greek; it is derived from the Greek verb πέρθειν (perthein), meaning “to waste, ravage or destroy”. Thus, his name Perseus means “the destroyer”, possibly alluding to his role in the Great Prophecy (i.e, Olympus to preserve or raze). It could also compare to his father, Poseidon, as he is known as the Earth-Shaker, often destroying places due to earthquakes. His mother, Sally Jackson, named Percy after the hero Perseus, as he was the only hero who had a happy ending in the Greek myths.
Jackson is a very common name of English and Scottish origin, coming from "Son of Jack" as many U.S political parties.
- Percy's birth date, August 18, wasn't revealed until The Last Olympian.
- Percy's real name, Perseus, is used by many of his enemies and many gods in the Percy Jackson and the Olympians series. In The Heroes of Olympus, he is mostly addressed as Percy, with the exception of The Blood of Olympus, in which he is referred to as Perseus by Polybotes and Kymopoleia.
- Percy never revealed his real name to anyone prior to the events of The Lightning Thief, when he first arrived at Camp Half-Blood.
- His real name comes from the fact that Perseus, a son of Zeus, was one of the only heroes in Greek mythology to have a happy ending (although Percy originally favored Hercules).
- Percy claims to have never gotten a grade higher than a C- in The Lightning Thief. However, in The Ultimate Guide, his report card gives him a B- in science. This may be from after the events of The Lightning Thief, possibly from his time in seventh grade (since he and Tyson successfully completed a science exam the fastest thanks to the latter's clumsiness).
- Percy is horrible at archery, as shown in The Lightning Thief, The Battle of the Labyrinth, and The Demigod Files. However, he has improved, as it is shown on his report card that "he has stopped shooting his own teammates."
- Percy has done many things that previous demigod heroes and mortals have such as:
- Killed a snake as a young child as Hercules did (The Lightning Thief).
- Slew the Minotaur (twice, once in The Lightning Thief and later in The Last Olympian) and defeated Procrustes as Theseus did.
- Killed Medusa as Perseus did (The Lightning Thief).
- Successfully won a fight with Ares as Diomedes did (The Lightning Thief).
- Took the Gray Sisters' eye and threatened them for directions to a location as Jason and Perseus did (The Sea of Monsters).
- Faced the Sirens, Scylla and Charybdis, Circe, and Laistrygonians as Odysseus did (The Sea of Monsters).
- Taunted Polyphemus and escaped his cave as Odysseus did (The Sea of Monsters).
- Got the Golden Fleece as the first Jason did (The Sea of Monsters).
- Battled and defeated the Nemean Lion, fought the Erymanthian boar and the Hydra and entered the Garden of the Hesperides as Hercules did (The Titan's Curse).
- Held the weight of the sky like Hercules did. (The Titan's Curse)
- Spent time with Calypso, like Odysseus did (The Battle of the Labyrinth).
- Entered the labyrinth with the help of a mortal with a clear sight like Theseus did (The Battle of the Labyrinth)
- Entered the Underworld alive (multiple times) and returned alive as Hercules, Orpheus, Odysseus, and Houdini did.
- Bore the Curse of Achilles as Achilles did (The Last Olympian).
- Carried Hera/Juno in another form across a river like Jason did (The Son of Neptune).
- Confronted Phineas, like Jason and the Argonauts did (The Son of Neptune).
- Faced Alcyoneus, like Hercules, did (The Son of Neptune).
- Fought Ephialtes and Otis, like Hercules and Dionysus did (The Mark of Athena).
- Fought in the Giant War like Hercules and Dionysus did (The Blood of Olympus).
- He has fought a total of five Titans, two of which he defeated (Artemis ultimately defeated Atlas). He also defeated a Giant, a feat which no other hero had accomplished other than Jason Grace who dueled Porphyrion, Hazel Levesque and Frank Zhang who killed Alcyoneus, and Dionysus and Hercules who fought alongside the gods against Typhon and the Giants and won both battles before they were granted immortality.
- On the cover of The Battle of the Labyrinth, he is seen opening Kronos's sarcophagus, while in the book he was wearing Annabeth's invisible Yankees cap.
- He is claustrophobic, as shown when he went up the arch. However, this doesn't seem to affect him in the Labyrinth.
- Some of the reasons that Percy Jackson got expelled were "accidentally" aiming a Saratoga battle cannon at his school bus, and hitting the wrong lever on a catwalk that made his class take an "unplanned swim" into the shark pool. Both are mentioned in The Lightning Thief.
- During The Son of Neptune, the only things Percy remembers are Annabeth, the fact that he is a demigod, and that Annabeth had some vague connection with San Francisco as well as her being his girlfriend, her looks, and the way she laughed and kissed him every time he did something stupid.
- Poseidon believes that Percy has risen above every hero, even Hercules.
- Percy is the only child of the Big Three without any known living demigod siblings so far.
- Percy, like Annabeth, at one point dreamed of getting his parents back together.
- Percy is the only one that has been able to keep the River Lethe from erasing his memories, as Percy won't get wet in water because he is a son of Poseidon.
- Percy Jackson is based on Rick Riordan's son, Haley, who has ADHD and Dyslexia.
- Percy appears on the cover and in the storyline of almost every novel in both the Percy Jackson and the Olympians series and The Heroes of Olympus series. The only novel in which he does not appear on the cover or in the story is The Lost Hero.
- Oddly, Percy seems to understand Latin in The Son of Neptune after being at Camp Jupiter for a short time, while Jason cannot seem to understand Ancient Greek during The Lost Hero even though he has been at Camp Half-Blood for longer. The reason for this is probably because Chiron taught Percy Latin back at the beginning of The Lightning Thief.
- Hazel thinks that Percy and Jason Grace are similar in personality, as they both give off the aura of power and authority, but also a sadness like that they have seen their destinies and are waiting for the day when they will face a monster that they cannot beat. Other ways that they have in common (besides being best friends) are:
- They have both been praetor at some point by being raised on a shield.
- They have/ had a girlfriend whose the daughter of a goddess (Annabeth Chase, Piper McLean).
- Aside from each other, they had a best friend who performs more comic relief than they do (Grover Underwood, Leo Valdez)
- At some point in the quest, each had girls that did not trust them (Piper McLean wasn't sure of Percy at first and didn't catch her eye as a hero, and Hazel Levesque and Annabeth Chase disliked Jason as he seemed too perfect).
- They were kidnapped and switched by Hera in The Lost Hero for the purpose of forging bonds between the camps.
- Both of their godly parents (Jupiter and Poseidon) didn't appear at all in the Heroes of Olympus series until The Blood of Olympus.
- Both were under charmspeak by a sorceress (Circe, Medea) which backfired.
- They were both compared to a superhero (Aquaman and Superman respectively).
- He's distantly related to his friend Frank Zhang due to his ancestor Periclymenus, something Percy tells him he is proud of.
- Hera told Percy that the Heroes of Olympus must come together, but Percy was the only demigod to be said to be a Hero of Olympus by the Olympians themselves in The Heroes of Olympus.
- In The Demigod Files, we see that Percy's worst fear is the camp in flames with his friends dead, or it could be interpreted as losing those close to him.
- Percy is Poseidon's favorite son.
- Polybotes thinks if he harms Percy, Poseidon will become weakened due to his love of his favorite son.
- Percy is the only known bearer of the Curse of Achilles not to be killed by their weak spot and the only one known to lose it.
- The River Styx is the only river Percy cannot control or breathe in.
- Percy has two pets, Mrs. O'Leary and Blackjack. As a result, he held the record of having the most pets out of every single demigod except for (as revealed in The Son of Neptune) and later tied with (as of The House of Hades) Reyna.
- Percy Jackson is one of only five characters whose birthday was revealed in the books. The other four are Thalia Grace, Hazel Levesque, Jason Grace and Annabeth Chase.
- Percy has only led one quest but has been on multiple others.
- In the film adaptations, Percy's age within the first Great Prophecy changed from being sixteen to being twenty, meaning that Percy was sixteen in the first film and seventeen in The Sea of Monsters.
- Percy's favorite brand of chewing gum is Trident.
- Percy's favourite colour is blue. This was in rebellion to Gabe Ugliano's statement about blue food not existing. Also, this link's to the blue of the sea, Poseidon's realm.
- Percy told Thalia Grace in The Titan's Curse that he likes listening to alternative rock and bands such as The White Stripes. He says that it's one of the "only CDs he owned that his mom liked."
- As of The House of Hades, Percy, Annabeth, and Nico are the only demigods known to have gone to Tartarus and survive the experience.
- In The Battle of the Labyrinth, when Percy first arrived on Ogygia, he said, "Holy Poseidon." In The House of Hades, when Leo Valdez first arrived on Ogygia, he said, "Holy Hephaestus." Poseidon and Hephaestus are their respective godly parents.
- It was mentioned in The Son of Neptune that it was unheard of for a probatio like Frank Zhang to be promoted directly to centurion rank. Percy was still probatio when he was made praetor, the highest rank at Camp Jupiter.
- Percy is thus far the only known demigod to be involved with two major prophecies in both series: he is the "half-blood of the eldest gods" mentioned in the Great Prophecy and one of the seven half-bloods in the Prophecy of Seven
- Percy is called "Peter Johnson" several times by Dionysus throughout the Percy Jackson and the Olympians series. He has also been called are Perry Johansson, Pierre, Pedro, and Jorgenson by Dionysus in The Battle of the Labyrinth and The Last Olympian.
- As of The Crown of Ptolemy, Percy is the first mortal to have no known Blood of the Pharaohs and first known male to host a goddess.
- Percy is on his school's swim team.
- Percy's astrological sign is Leo, something Leo teases him about in The Blood of Olympus.
- When Percy arrived at Camp Half-Blood and Camp Jupiter, he was looked at as bad luck at both camps when his divine parent was determined.
- While acting as a narrator, Percy heavily censors explicit content.
- It was revealed in Percy Jackson's Greek Gods, that Percy's favorite type of music is rock 'n' roll.
- Percy is the only male hero of the Seven whose mother is still alive.
- Percy was one of the only two demigods in Camp Half-Blood (the other being Thalia) who was considered to be capable of equaling Luke. Although unlike Thalia, Percy was fairly easily beaten by Luke in their only duel to the death whereas Thalia not only fought Luke equally but even beaten him in their only duel to the death.
- Also unlike Thalia, who believes herself to be superior to Luke, which was proven in their fight on the Titan's Curse, Percy was uneasy of the prospect of fighting Luke.