Percy Jackson

''This article is about the character. You may be looking for the the series, the video game, the film, or the film soundtrack.''

"Yeah, flattering. But actually I'm the son of Poseidon. I'm from Camp Half-Blood."

- Percy, to the giant Alcyoneus, in The Son of Neptune

Perseus "Percy" Jackson is the main character and the narrator of the Percy Jackson and the Olympians series as well as one of the main characters in The Heroes of Olympus series. He is a Greek demigod son of Poseidon, god of the sea and Sally Jackson. He is a former Praetor of the Twelfth Legion at Camp Jupiter and currently Annabeth Chase's boyfriend. He is portrayed by Logan Lerman in The Lightning Thief.

Early Life
Perseus "Percy" Jackson was born on August 18. He was raised by his single mother, Sally Jackson. When Percy was a baby, his father, Poseidon, left to protect him and his mother. 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. When he was a toddler, his mother married Gabe Ugliano, whom Percy hated. Strange things often happened around Percy. For example, in preschool, one of the preschool teachers put him down for a nap, not realizing a snake was in the bed. Percy eventually strangled it to death with his bare hands. While he was in early elementary school, a large man followed Percy around when he was at school, but the teachers eventually got the man to leave. However, nobody believed him when he said that the man had one big eye. When he was in fourth grade, he accidentally hit the wrong leaver on the catwalk when his school was visiting Sea World Shark Pool and made his class take an unplanned swim. Then in fifth grade, he accidentally fired a war cannon which hit the school bus. Percy commented that he was expelled from six schools over the course of six years.

The Mark of Athena


Percy is seen walking with Hazel and Frank as the Argo II arrives at Camp Jupiter. Annabeth, in order to be reunited with him, comes up with a plan to appease the god of borders and allowed them to enter Camp Jupiter.

Personality
"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 Chase

Percy is brave, spirited, a natural leader, and is willing to risk his life to save friends, family, strangers, and sometimes even enemies. He has a sarcastic and smart sense of humor, a laid back demeanor, and has earned the respect of all the Olympians, including Artemis (who strictly dislikes men), Dionysus (who hates most heroes), and Hades (who generally hates people). He also earned the trust, and respect of the Romans of Camp Jupiter (who don't usually trust Greeks). Percy remains true and never goes back on his word. However, he is definitely not perfect. Percy is somewhat short-tempered, and thus has trouble controlling his anger (such as when he sees bullying) and tends to do or blurt out things before thinking, no matter the consequences, causing him to get into a lot of trouble. 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 also has a rebellious streak just like him. Annabeth Chase 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 see 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 restrained or forced to obey. Percy also has small feelings for Annabeth Chase at the beginning of the series, but finally confirms it in the 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.

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". 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.

Fatal Flaw
"To save a friend, you would sacrifice the world."

- Athena

Percy's fatal flaw was excessive personal loyalty: he would risk the world and even his own life to save a loved one or even a stranger according to Athena. Athena was obviously displeased that her own daughter was an object of that loyalty. Kronos previously exploited this trait in The Lightning Thief, The Sea of Monsters, and The Titan's Curse. Athena also says "The most dangerous flaws are good in moderation" when Percy protests that personal loyalty isn't all that bad. In The Son of Neptune, Mars states to Frank that Percy's flaw would hinder the completion of the Prophecy of Seven, which worries Frank. Hera also states that his fatal flaw will keep the seven together.

Appearance
"He's good-looking, but don't you dare tell him I said that."

- Annabeth Chase

Percy is described as a fairly tall, very handsome young man, with jet black hair with a grey streak in it (after holding the sky in The Titan's Curse) and bright sea green eyes. He later looses his grey streak, as stated in The Mark of Athena by Annabeth. He gets his looks from his father. At the beginning of the series, Percy was average in athletics but later from his training, becomes very fit and muscular. He does not seem to know it but many girls find him very attractive, as stated by Hazel that "He had the good looks of a Roman god". He is also complimented by Calypso, who, when asked whether she was in love with Percy states, "If you could see your face. Of course, you". After he slew Polybotes, 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 12th Legion Fulminata. According to Piper McLean, he looks like a skater and a troublemaker, but handsome. Piper later states that when Percy pleads his eyes seemed to be "like a cute baby seal that needed help" and wonders how Annabeth ever won an argument with him.

Abilities
"Not that powerful, eh? Could have fooled me. You're the son of the Earth-shaker, lad. You don't know your own strength."

- Hephaestus

Percy, as a demigod, has these 'disabilities' 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.

Limited Clairvoyance: Percy is able to watch events in distant locations and times, particularly hidden things because of his father's unpredictable nature. He occasionally takes the place of a different person in his visions (such as Hercules).

Fighting Skills: Percy is a naturally talented and expert swordsman, capable of holding his own against and even defeating larger, more experienced, and more powerful opponents, including gods and Titans as well as monsters. 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. 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.

Above Average Strength: In The Titan's Curse, Percy was shown to be strong enough to be able to single-handedly hold up the sky (but just barely). He was also shown in The Lightning Thief to be able to jump on the Minotaur's back and rip off it's horn. In The Son of Neptune, even after losing his Curse of Achiles, Percy was able to defeat Polybotes with nothing but his sword and Terminus' head.

Curse of Achilles: 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 defeat entire armies as well as gods like Hades and Titans like Hyperion (albeit he had some help in defeating Hyperion). He later loses it by touching the Tiber river as it was a Greek blessing.

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.

Demigod Abilities
As a son of Poseidon; one of the Big Three, Percy is an extremely powerful demigod. He has a degree of divine authority over his father's domains and subjects. Hazel had considered Nico di Angelo the most powerful demigod she knew, until she met Percy, and believed that Percy's power rivaled Nico's and Jason Grace'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 and he has shown to be more powerful than Ares while in this state. In The Lightning Thief, Percy was able to defeat Luke in the Camp Half-Blood swordsmanship class 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. 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 almost omnipotently. He can control it in order to make it explode, or use it to grab something. 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.
 * 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 Mt. Saint Helens, creating water out of nothing to cause a volcanic eruption. He also uses this skill while creating his own personal hurricanes. While traveling on the Argo II during The Mark of Athena, he presumaby used this ability while combining his powers with Jason Grace's to create powerful storms.
 * Superhuman Strength: Percy's strength increases greatly to the point where he was able to hold the sky, (which is The Curse of Atlas), on his shoulders.
 * Healing Factor: He can heal most wounds and cure most poisons when in contact with water.
 * 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.
 * Waterbreathing: Percy can breathe underwater and diffuse the oxygen in the water to create oxygen bubbles that allow his non-hydrokinetic friends to breathe underwater.
 * 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.
 * 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.
 * Sailing Skills: 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) because he has perfect bearings on the ocean, he can easily navigate his way at sea.
 * Communication: Percy has divine authority over and 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).

Aerokinesis (limited): Percy can summon hurricanes and other types of storms, but the extent to which he can control them is as of yet unknown. 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.

Geokinesis (limited): Percy can generate earthquakes and (consequently) cause volcanic eruptions, but his control of this technique is less than that of a child of Hades.

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.

Electrokinesis (very limited): Percy used this skill unintentionally on one occassion, while creating his own minature 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 limited to a side effect of his storms.

Heat Resistance: Percy has as far higher than normal resistance to heat and burns, similar to that of a cyclops, due to his father's oceanic nature. 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 superheated steam from the eruption of Mount Saint Helens.

Magical Items
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 with 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 will always return to Percy's pocket. It used to be the weapon of Hercules, who got it from Zoë Nightshade. In the movie Riptide can deflect blasts from Zeus' lightning bolt. 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 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.

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 wrist watch 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 in the beginning of The Battle of the Labyrinth. It was lost later in Battle of the Labyrinth when thrown at Kampe. 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 split it in half and gave 1 half to the Hudson River and 1 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 Chase 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 the Princess Andromeda and Charybdis. Given to him by Hermes.

Magical Pearls, these pearls can transport a person to the sea when smashed. Given to Percy by a Nereid.

Moonlace, a flower that grows in 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 trashcan 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' sword.

Magical Pets/Companions
Blackjack: Percy's pegasus, who has been his personal steed since Percy rescued him in The Sea of Monsters.

Mrs.O'Leary: Percy's pet hellhound, whom he received from Daedalus before he died in Battle of the Labyrinth.

Annabeth Chase
"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 thinking about Annabeth

Annabeth 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 share a rivalry. Percy eventually developed a crush on her as they both became more fond of each other. Aphrodite told him that they will have a "tragic love life".

Annabeth has kissed him (technically) five times- once, after winning the chariot race in The Sea of Monsters, though that was only on the cheek, in The Battle of the Labyrinth again for luck as she leaves him to fight the telekhines at Mt. St. Helen's, next, 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 underwater in the canoe lake as Percy described as "just about the best underwater kiss ever." Annabeth tells Piper 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 of kissed him a lot, which meant he probably did stupid things a lot.

Annabeth 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 two months before he disappeared (in 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 of anger he smashes Hera.

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 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, near the end of the book. They fall into Tartarus when Percy swears that he will never let her go again.

Calypso
""She would always be my biggest what if""

- Percy about Calypso in The Battle of the Labyrinth

After Percy was stranded on the island of Ogygia, he was healed by an immortal named Calypso who 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 the 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.

Reyna
Reyna was bitter towards Percy at the beginning of The Son of Neptune but this gradually began to change as the story goes on. When Percy first reached Camp Jupiter, she had been bitter and cold to him and apparently to sharing her knowledge of him before he came to the Roman Camp (Percy had an amnesia but he had a feeling that he should know her). She interrogates Percy and throughout the encounter she implies that they've already met. Later, she flirts with the idea of Percy becoming a Praetor, because she feels like she needs him and it will draw them closer as "friends," though she may mean romantically, but Percy states he already has a girlfriend and he also declined her offer of becoming a praetor. When she see's him when he comes to the battle she smiles widely. During the battle, when she sees her sister Hylla, she glances at Percy with a look that says:'' I could hug you right now. ''After, Percy takes out Polybotes, with the help of Terminus, and the campers believe he is a good warrior, so they elect him as praetor, making Reyna his co-praetor.

Rachel Elizabeth Dare
""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

Percy and Rachel were known to have spent a lot of time together in his normal everyday living, and she was known to have filled the void in his mortal life. 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 Last Olympian, they were out on a beach together after Percy had driven his stepdad's car out to that spot. Percy says it was as if his dad were keeping the sea nice, just for them. While they were alone, Rachel admits her feelings in the form of a hypothetically question (seen above), but Beckendorf and Blackjack landed on the hood of Paul Blofis' Prius before he could answer (though he remarked to himself that he felt like one of Apollo's sacred cows- "dumb, slow, and bright red"). After he got up, Rachel kissed him anyways. 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). However, Percy's growing love for Annabeth never stopped so Percy and Rachel's love life didn't progress as much as his with Annabeth's had. 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 went on to become the new Oracle (he thinks she dumped him, "which kinda stunk since we were never dating in the first place").

Grover Underwood
Grover and Percy have been best friends since they were in middle school in Yancy Academy and at the time Percy would protect him from bullies and others that would pick on him He was not aware of Grover being a satyr at that time. 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 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 has had all the Satyr's looking for Percy when he vanished in The Lost Hero.

Jason Grace
Jason and Percy have been shown to be on good terms, but have also fought. It is mentioned in the Mark of Athena that Jason "Thought like him, Percy". They both hate Octavian, and Annabeth calls their relationship a "Budding Bromance". While fighting Otis and Ephialtes, the two are able to work well together. It is also shown that when working together their powers get more intense when they created a huge storm at Fort Summer.

Clarisse La Rue
Clarisse 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). She later learns that Percy beat her father, causing her and her cabin to dislike Percy. They manage to grow a bit closer in The Sea of Monsters when Percy manages to free her from Polyphemus 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.

Thalia Grace
They first meet at the ending of The Sea of Monsters when she was turned back into a human 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. Soon after, their relationship becomes a Love-Hate Relationship that a brother and sister would have during The Titans Curse, even going as far as fighting with their elemental powers, but at the end Thalia considers him a friend, showing him this when she hugged him after she joined the hunt and became a huntress of Artemis stating "I am honoring a friend."

During the Titan War, she and the other Hunters aided Percy and Camp Half-Blood. She also decided to make lunch plans with him and Annabeth after the war was over. 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.

Nico di Angelo
Nico has the ability to annoy Percy Jackson, quite easily. He does this in The Titan's Curse by asking Percy several questions ("At this point, I was ready to stick the kid in a meat-flavored sack and throw him to the wolves."), in The Last Olympian by leading Percy to his almost demise, and in The Son of Neptune by not telling him he previously knew him ("Percy was anxious to find Nico for his own reasons- to wring the kid's neck for having pretended he didn't know Percy when he first came to camp."). They have a brother-like relationship, and Percy feels responsible for him, especially after the death of Nico's sister, Bianca.

Zoë Nightshade
Zoë is the daughter of Atlas. At first she did not like Percy, but then she came to respect him, saying that he was nothing like Hercules (who betrayed her), and deserved Riptide. She was injured on Mount Othrys, the Titans' base, and is transformed into a constellation named 'the Huntress' after her death by Artemis, as Zoë is part of the Hunt.

Hazel Levesque
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 Gaia. 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.

Piper McLean
Of the seven, Percy seems least connected to Piper and their friendship is not shown in depth in The Mark of Athena. Piper thinks of him as a troublemaker and unimpressive (at least compared to her boyfriend Jason Grace and the stories she heard at Camp Half-Blood). Despite this, Piper is shown content having either Jason or Percy being the "leader" of the seven. Piper technically saves his life twice during The Mark of Athena. 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.

Sally Jackson
Percy loves his mother, Sally 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.

Poseidon
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. A 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.

Paul Blofis
Percy is at first wary of Sally's new boyfriend, Paul Blofis, but eventually warms to him. Percy is very happy to have Paul as his stepfather when his mother gets married to him. Interestingly, both Percy and Poseidon at first mispronounce Paul's name as "Blowfish."

Tyson
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. He and Tyson have gone on many adventures together, and Tyson always looked up to Percy as his older brother and even used his knowledge of the forge by making a wrist watch that transforms into a shield for Percy with their 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.

Gabe Ugliano
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 the Medusa's head given to her by Percy to turn him into a statue. She sells him and he currently on display in an unknown museum.

Frank Zhang
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 music, prophecy, poetry and archery, will claim him due to his excellent archery skills. Though he doesn't want to be related to Octavian.

Chiron
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.

Octavian
When they first met, Octavian was suspicious about Percy thinking that he's a spy for the Giants. 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. 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 him if she gave him a signal.

Luke Castellan
At the beginning of the series in The Lightning Thief, Percy thought that Luke 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 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, 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. 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 happen to the other unclaimed demigods wind up like him and 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. 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.

The Lightning Thief
Percy is played by Logan Lerman. His character's age has been increased from 12 to 17 to appeal to older viewers. Throughout the film, Percy has not been shown to display his ability to remain dry underwater, or anywhere else either.

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Video Game
In 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.

Etymology
Perseus is a Greek name coming from the original Hero, Perseus, meaning "Destroyer" or "To destroy" as this could compare to Percy destroying many schools and monsters in his lifetime. It could compare to his father, Poseidon, as he is the God of Earthquakes as he destroys places due to the earthquakes. His mother, Sally Jackson, named Percy after the Hero Perseus as he was the only hero who had a happy ending in Greek myths.

Jackson is a very common name in the English and Scottish origin, coming from "Son of Jack" as many U.S political parties.

Trivia

 * Percy's birth date, August 18, wasn't revealed until The Last Olympian.
 * Percy's real name is Perseus. His mother named him this because Perseus was one of the only heroes in Greek mythology to have a happy ending.
 * Percy is a son of Poseidon, but Perseus was the son of Zeus.
 * It is stated in The Lightning Thief that Percy has never obtained a grade higher than a C-, though in The Ultimate Guide his grade in science was a B-.
 * Though Percy has said many times in the series that he dislikes Clarisse, in The Demigod Files he reveals that he really does care about her, and considered her as a friend. Clarisse feels the same way about him.
 * It is also notable that Percy is horrible at archery as shown in The Battle of the Labyrinth, The Lightning Thief, and The Demigod Files. However, he has improved as it is shown in his report card that "he has stopped shooting his own teammates."
 * Percy has done many things previous demigod heroes and mortals have such as:
 * Slayed the Minotaur twice (once in The Lightning Thief, and later in The Last Olympian), defeated Procrustes, and entered the Labyrinth as Theseus did.
 * Killed Medusa as Perseus did.
 * Got the Golden Fleece as the first Jason did.
 * Battled and defeated the Nemean Lion, fought the Eurythian boar and the Hydra and entered the Garden of the Hesperides as Hercules did.
 * Entered the Underworld alive (multiple times) and returned alive as Hercules, Orpheus, and Houdini did.
 * Beared the Curse of Achilles as Achilles did.
 * Killed a snake as a young child as Hercules did.
 * Faced the Sirens, Scylla and Charybdis, Circe, and Laistrygonians.
 * Taunted Polyphemus (by insulting him and then saying that he was Nobody) as Odysseus did.
 * Took the Gray Sisters' Eye and taunted them for directions to a location as Jason and Perseus did.
 * Carried Hera/Juno in another form across a river like Jason did.
 * Held the weight of the sky like Hercules did.
 * He has fought a total of four 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 Krios, and Hercules, who fought alongside the gods against Typhon, and a Giant and won both battles.
 * On the cover of The Battle of the Labyrinth he is seen opening Kronos' 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 mentioned that Percy has risen above every hero, even Hercules.
 * Percy is the only child of the Big Three without any 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. As of now, the only novel on which he does not appear on the cover or story is The Lost Hero.
 * Percy often mishears what people say, and then proceeds to say what he thought they said out loud (which usually makes him look stupid or goofy).
 * Oddly, Percy seems to understand some 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 that they have seen their destinies and are waiting for the day when they will face a monster that they cannot beat.
 * He's distantly related to his friend Frank Zhang, something Percy tells him he is proud of.
 * Hera told Percy that the Heroes of Olympus must come together, at that time 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 or it could be interpreted as losing those close to him.
 * Polybotes thinks if he harms Percy, Poseidon will become weakened due to his love of his son.
 * Percy is Poseidon's favorite son.
 * Percy has fought and defeated a total of two major gods: Ares and Hades and one minor: Phobos. Clarisse La Rue ultimately defeated Deimos.
 * Percy is the only known bearer of the Curse of Achilles not to be killed in their weak spot and the only one known to lose it.
 * The River Styx is the only river Percy cannot control nor breathe in.
 * Percy has two pets, Mrs. O'Leary and Blackjack, second most to Reyna, who has Argentum, Aurum, and Skippy.
 * Percy Jackson is one of only three characters who's birthday was revealed in the books. The other two are Thalia Grace and Jason Grace.