Thalia Grace

Thalia Grace is a demigod, a daughter of Zeus and a human with the surname Grace. She was a friend of Annabeth Chase and Luke Castellan. She is famed for being turned into a tree to save her friends.

Percy revived her from her tree form in The Sea of Monsters and was thought to be the Chosen One by the General. However, she became an immortal hunter, ensuring that she never turned sixteen to fulfill The Prophecy. Thalia, being the daughter of Zeus can control lightning. She is afraid of heights, which is odd since her father is the god of the sky. This is shown in The Titan's Curse, after Thalia flies Apollo's sun chariot. Thalia, at that time, appears to be horrified and doesn't fly well.

History
Thalia is a daughter of Zeus. Her mother was a beautiful actress but was also an alcoholic. For this reason, Thalia was not on good terms with her. Therefore, she ran away. In The Last Olympian, the Titan Prometheus calls Thalia 'Thalia Grace', she is said to have stiffened up and replied, 'That was my mother's surname. I don't use it.'

She later met Luke Castellan, and they teamed up together.

Luke and Thalia wandered around, and eventually ran into Annabeth, a plucky seven year old. Luke liked her for her courage, and gave her his knife, and promised that he wouldn't fail her like her family had failed her, and Thalia was Annabeth's constant bodyguard.

Eventually they all ran into Grover Underwood. Together, the quartet traveled to Camp Half-Blood but were chased by monsters from Hades. They would have escaped, except for the fact that a Cyclops stopped them so that monsters could catch up. The cyclops held Thalia, Luke and Grover in the air to direct the monsters in their direction, but Annabeth saved them by stabbing the Cyclops in the foot.

The monsters began to catch up, so Thalia made the ultimate sacrifice: she elected to stay behind so they could make it safely to Half-Blood Hill. It is unknown whether she actually fought the monsters or not, but she most likely fought them and was mortally wounded. Zeus, feeling sorry for his daughter, saved her life by turning her into a pine tree, later renamed Thalia's tree. This tree became a barrier against monsters and mortals unless they were invited by someone inside.

The Lightning Thief
It was mentioned to Percy that Thalia was turned into a pine tree when she risked her life saving her friends atop of Half-Blood Hill, which guarded the boundary line for Camp Half-Blood. She also appeared in Percy's dream.

The Sea of Monsters
Thalia's tree is poisoned and the magical borders around camp are failing. Clarisse is sent on a mission to find the Golden Fleece and revive the tree, but Percy and Annabeth don't want to risk Clarisse failing, and also go on a separate quest.

Percy asks Annabeth about Thalia, and whether she would have agreed with Luke. Annabeth was exasperated by the question, and asked Percy if he would ever betray Olympus, which the answer was no. Annabeth said that Thalia got angry with her father a lot, but her personality and heart resembled Percy, and she would never have betrayed her family.

Thalia later appeared in Percy's dreams and it is shown she might be the one to bring back Kronos to life.

She comes back to life to conclude the second book after Clarisse places the Golden Fleece on her tree, which is good and bad because it means that Thalia can also be the one of the prophecy and Kronos would take advantage of that. Annabeth is stunned at Thalia's return.

The Titan's Curse
Thalia and Percy have some occasional fights at camp because their similar personalities tend to clash, and Thalia was sometimes called "Pinecone Face" by Percy, and in contrast she called him "Seaweed Brain" which Percy does not like because it's sort of Annabeth's pet name for him.

During the summer, Thalia stays in the Zeus cabin, and is taught by Chiron. She tried to adjust to her life at Camp Half-Blood, and is happy there, and later states she has peace at that place. During this time, she gets to know Annabeth again, gets to know Grover, tries to get along with Percy, and is taught how to manipulate the Mist by Chiron, among other things.

After the summer is over, Thalia starts going to the same all-girl boarding school in Brooklyn as Annabeth. They became closer while they went to school together, and Thalia must have been upset when she found out Annabeth's dad and his family were moving, which meant Annabeth would have to choose between New York City and living in monster overrun San Fransisco.

Grover is sent on a mission to find more half-bloods, and he sends a distress call from a military school, Westover Hall. Thalia, Percy, and Annabeth go to Westover Hall, at the time of the school dance. Thalia manipulated the Mist to trick a resident teacher, but it doesn't convince the vice principle, Dr. Thorn, who is a Manticore.

Thalia and Grover dance together to try and seem normal, and Percy realizes that Dr. Thorn is taking away the two demigods that they are trying to save, and runs off without telling the others. Percy is captured by Dr. Thorn, but is rescued by Annabeth, Thalia, and Grover.

In the battle, with the quartet losing, Artemis and her Hunters attack Dr. Thorn. Annabeth tries to stop Dr. Thorn from killing Percy, and leaps onto him and attacks him with her knife. Dr. Thorn jumps off the cliff, and vanishes, along with Annabeth.

Thalia is angry that Zoë is there, and even more angry when they convince Bianca, one of the demigods they saved, to join the Hunters instead of going to camp and helping their cause along with her brother Nico who they also saved. She is also furious at Percy, who messed up on warning them, and as a result, Annabeth is possibly dead. This depresses Percy to no end, and he wants to try to find Annabeth, but Artemis promises to find her, and leaves her Hunters, Percy, Thalia and Grover in the hands of her twin brother Apollo.

Thalia thinks her half-brother Apollo is 'hot' and she blushes when he speaks to her. He convinces her to drive his sun chariot, and she almost kills them all, as she is terrified of heights, and it is a flying car. Everyone is relieved when they finally land.

At camp, Chiron is worried about Annabeth, and knows she is still alive, and hopes she will pretend to cooperate until they can save her. Soon, Zoë has a dream/nightmare about Artemis being captured.

During a game of Capture the Flag, Percy causes them to lose due to his hasty actions, and Thalia is furious at him, and accidently electrocutes him. A battle ensues between the two powerful demigods, and the Oracle breaks it up by floating over, and giving her a prophecy for a quest.

Five shall go west to the goddess in chains,

One shall be lost in the land without rain,

The bane of Olympus shows the trail

Campers and Hunters combined prevail

The Titan's Curse must one withstand,

And one shall perish by a parent's hand.

Zoë asks for a quest, and Chiron gives it to her. It is decided that they will take two Campers, and three Hunters. Thalia quickly volunteers, silently asking anyone to question her right, when Annabeth, her close friend, is also missing at the hands of a dark evil. Zoë, Thalia, Phoebe, Bianca, and Grover all volunteer, and Percy is shocked and upset that he can't go.

However, the Stoll brothers give Phoebe a poisoned T-shirt that covers her in painful hives as revenge for Phoebe's actions against them in Capture the Flag. Even though they only have four questors, Zoë insists they leave, because she does not want anyone else to be in danger, but Percy follows them, determined to rescue Annabeth.

Before the quest, Nico di Angelo makes Percy promise to keep Bianca safe during the quest, and he agrees to promise he will do his best.

The Hunters, Thalia, and Grover stop at a museum after many hours and from a distance Percy sees Dr. Thorn confirming that Annabeth is alive and that his dream had been true. Dr. Thorn does not go into the museum with the rest of them and instead goes somewhere else. Percy follows, and soon he sees the General and Luke.

There the General creates Sabar-tooth tiger kittens, and fires the foolish mortal who brought him the tiger teeth. He finally gets the right teeth, which are used to create skeletal warriors, which are almost impossible to destroy, by putting dinosaur teeth, which is really dragon teeth, into soil and casting a spell. Their original purpose was to kill Zoë and Bianca, and it is mentioned that they have a surprise for Thalia to keep her occupied so that they can capture her. The General was about to give them the cloth to get the Hunters' scent when Percy grabs it. However, the skeletons tear a chunk out of Percy's sleeve and inhale his scent, making him their target.

Percy quickly escapes using Annabeth's cap and notifies Thalia and the otheres. Though the group (Zoë and Thalia in particular) was rather surprised and angry to realize he had followed them, they are interrupted when the Nemean lion attacks. Nothing is able to pierce its armour, much to the displeasure of the group. However, Percy discovers a weakness and has an idea to expose it. He finds astronaut food in a gift shop and throws them into the Nemean lion's mouth. It causes the creature to expose his mouth long enough for Zoë to finish him off with an arrow.

Zoë then gives Percy the lion pelt, saying that he was the one who defeated the lion fair and square, even though she was the one who shot the killing arrow. The skeleton warriors, disguised by The Mist as gray security men, are now following Percy, but Zoë refuses to leave him behind as she realizes that he is the fifth quest member.

They soon reach an area called Sun West line after taking many trains to lose their follower. There, they meet a homeless person and share his fire, even though they don't know that he is in fact Apollo.

Percy soon encounters Apollo again when they get on a train headed west. Apollo advises him to seek out Nereus, the Old Man of the Sea.

Thalia and Percy both sit together, and Percy discovers that Artemis had offered to make her a Hunter, and that is why she didn't like them. Thalia is quiet at first, and then tells him that she didn't join them because of Luke, and then says that Annabeth had been thinking about joining them, and that he should figure out why.

Later, they stop for a break, when Grover faints as Pan's presence hits him. Following that, the skeletons surround them, using handguns. Thalia tries to use her shield against them, but it doesn't work. And though Percy deflects a bullet and cuts down a skeleton warrior, he immediately forms back together, reassembling himself. However, that did not stop another from shooting at Percy. Miraculously, Percy survives and discovers that the pelt he wears is in fact bulletproof. Bianca kills a skeleton warrior, her celestrial bronze knife causing the skeleton to catch fire, and they can't figure out why.

With help from Apollo, they reach a small town in New Mexico. There they are surrounded by the skeletal warriors. Grover then senses Pan's presence and a wild gift from him, the Erymathian Boar. The boar comes to carry them further on to San Francisco. It takes them to the junkyard of the gods, and Percy meets Ares and talks to Aphrodite, at which point it is hinted that Annabeth and Percy will most likely have a romantic future, and she warns him against picking up anything in her husband's junkyard.

Percy relays this warning to the group, and Zoë doubts that was all Aphrodite had to say, but Percy is too embarrassed to say anything about what she said about him and Annabeth.

Eventually, the group enters the junkyard, where Bianca tries to steal something, an action figure for her younger brother, but she awakens a defective Talos and enters via a maintenance hole in his left foot to destroy him. She succeeds in destroying the prototype Talos, but goes missing afterward. At this time it is undetermined if she is alive or dead, and they don't bother looking for her, as the prophecy said they would lose one in the land without rain.

They reach a river, where the group canoes to the Hoover Dam. They are attacked by the skeletal warriors (but not before making some hysterical 'dam' jokes) and Percy meets a mortal girl who can see through the Mist, named Rachel Elizabeth Dare. She saves Percy by confusing the skeletons, allowing Percy and his friends to escape. The group gets trapped on the dam but Percy asks Thalia to pray to her father. She hotly tells him that her father never answers her prayers, but Percy begs her, and she does. They then are rescued, and fly off on giant angel statues built for Zeus by Athena.

Reaching San Francisco, Percy is picked among the group to wrestle Nereus, the Old Man of the Sea. He does, and learns Bessie the Ophiotaurus is the monster they seek, for burning its entrails will give them power to destroy Olympus,Percy had met Bessie at the Hoover Dam and Bessie follows them. Grover takes Bessie back to camp after Thalia is enticed to wield the power by Dr. Thorn, who attacks them on the pier. He tells her it is her destiny to kill the Ophiotaurus, and Thalia is scared in that moment, knowing that she just might listen to him. Percy attacks Dr. Thorn, and they all get involved the fight, including Thalia. But they begin to lose the battle. They manage to get an Iris message to Camp Half Blood and see Dionysus, the Camp director. He saves them after Percy reluctantly asks for help, and the only reason he asked was because of Thalia's expression. She had died for her friends before, and she would do it again. Percy spares her this by humbling himself to Dionysus.

They go to see Annabeth's father to ask for help and he lends them his car, which cannot be returned to him as it explodes due to a lightning bolt that Kronos threw to make Thailia angry at her father. Thalia is shaken by this, thinking that Zeus tried to kill her, remembering the part of the prophecy one shall die by the parent's hand, but Percy comforts her and tells her it is just Kronos, trying to make her angry with her father. His words convince her, and she manages to stay focused.

They all then climb to the Garden of the Hesperides, where Zoë meets her sisters and is poisoned by the dragon, Ladon. They continue to the place where Atlas used to hold up the sky, and they see Artemis taking on his burden. Annabeth is bound and gagged by Luke and Atlas.

Realizing that the prophecy made by the Oracle involved him, Percy takes the burden--the Titan's curse--from Artemis. In the ensuing fight, Atlas kills his daughter by throwing her against rocks; she is later turned into the constellation "The Hunteress" by Artemis. Artemis gets Atlas to take his burden from Percy, as only a Titan can be forced to bear the sky.

They discover that Kronos used Thalia to twist destiny into her hands, since she would be turning sixteen on the day following the Winter Solstice.

Thalia demands answers from Luke, as to why he has betrayed them all, and Luke tries to pasify her, but she takes out her spear and says you're not Luke, I don't know who you are anymore and attacks him.

Thalia and Luke battle each other fiercely, fierce anger on Thalia's side, desperation on Luke's. Thalia gaining the upper hand, and in the battle, Thalia manages to take his weapon, saying that he could never beat her. He tries to grab his weapon, and as pure instinct, Thalia kicks him, and Luke falls into a chasm. She is shocked that she just killed Luke, the boy she used to love, but it is confirmed by Poseidon that the traitorous demigod had survived.

They go to Mount Olympus via pegasi, including Blackjack a friend of Percys.

Thalia escapes her deadly path, and turned to her half-sister, Artemis, who made her a Hunter, which would stop her from being sixteen, because whoever becomes a Hunter becomes immortal, unless they shall die in battle, or break the oath by falling in love. Thalia made this decision because Luke was no longer an issue in the matter of her life, as he had betrayed her.

Thalia makes peace with Percy after becoming a Hunter, and she and Annabeth hug.

The Battle of the Labyrinth
Thalia was absent from Camp Half-Blood this summer due to her adventures with Artemis and the Hunters, but she is not mentioned once in the book.

The Last Olympian
Thalia and the Hunters come to New York City to help the campers to help fight Kronos's army off, and the Campers are very relieved to see them. Thalia says she has been on a great many adventures, and she, Annabeth, and Percy promise to buy cheeseburgers after the battle and talk about what they've been doing since they saw each other last.

Thalia is absent at the point of Luke's death and is never shown to have found out. She appears to survive and continue to work in Artemis's Hunters, and will presumably be immortal for the rest of time, unless she falls in love or dies in combat, or if she decides to leave, as her joining the Hunters was only to escape the prophecy, which is likely, as she has no objections to falling in love, as shown by her attraction of her half-brother Apollo.

She appears in the last part of the second book, third, and fifth book.

Powers and Abilities

 * Thalia is an extremely powerful half-blood, holding her own against Percy Jackson, as shown in The Titan's Curse during their brief fight, although she sent Percy ten feet backwards she was only saved from being pulverized by Percy's water attack by the Oracle of Delphi. Percy beating her would make sense as though Zeus is the older brother and leader of the God's, Posidon is known in the myths to be the most powerful Olympian, making it likely Percy is more powerful than she is.
 * Thalia can send powerful amounts of static shock throughout another persons body on contact.
 * Thalia can 'manipulate the Mist' which means she can make things as she wants them to appear to the eyes of a mortal (taught to her by Chiron).
 * Things that belong to her father's domain can do as she asks, such as statues of the angels in The Titan's Curse, which were gifts to her father. They, on her request, flew her and her friends to San Francisco when she asked them to.
 * Thalia has ADHD like other half-bloods, which allows her heightened awareness in combat.
 * Thalia has a strong leadership quality which is possibly a result of being the daughter of Zeus.
 * Thalia has electrokinesis due to Zeus, the god of lightning, being her father.
 * Thalia has some aerokinesis(control over air and the sky), being the daughter of Zeus, Lord of the Sky. Since she has acrophobia she has yet to test them.
 * Thalia has always been able to beat Luke in battle.
 * Thalia became one of Artemis's hunters in the end of The Titan's Curse, and as a result is immortal, unless she dies in battle, chooses to leave, or falls in love.

Weapons

 * A copy of Aegis that expands from a metal bracelet that she wears on her wrist, which many of the campers and monsters cower in front of.
 * A collapsible spear that expands from a Mace canister that she uses to manipulate her powers.(This spear and Aegis were most likely left at one of Thaila's, Annabeth's, and Luke's hideouts when she joined up with the Hunters).


 * A Hunter's bow after joining the Hunters.
 * Two hunting knives.

Fatal Flaw
It is implied that she has a weak resistance when she is offered power. She is also afraid of heights, a quality Percy finds strange, as her father is the Lord of the Sky. She is also extremely determined, as revealed in the short story The Sword of Hades in The Demigod Files. She has trouble abandoning a difficult task that she has started but is not able to complete.

Film
Thalia has not yet been cast, and presumably will not be until the film version of The Sea of Monsters starts production.

Trivia
When Thalia appeared in Percy's dream in The Lightning Thief she has green eyes, although through out the rest of the series she has blue eyes.