Annabeth Chase is the half-blood daughter of the goddess Athena and the mortal man Frederick Chase. She was born July 12, 1993. Being a daughter of Athena, who is a virgin, she was not physically born, but is a literal 'brain child'; she was born as a gift to the man her mother loved. When she was seven, she ran away from home. On her journey, she met Luke Castellan, Thalia Grace, and Grover Underwood. Together, they traveled to Camp Half-Blood, running from and fighting hordes of monsters. When they got to the borders of Camp half blood,Thalia made her final stand fighting monsters so that Luke, Grover and Annabeth could safely get into camp. Thalia's father, Zeus, changes her into a pine tree on top of a hill that comes to be known as Thalia's Pine Tree. Annabeth lived at Camp Half-Blood for five years prior to Percy Jackson's arrival.
It has been shown that Annabeth does not get along with her father and step-family. According to her, her father was not very happy when she first appeared and tends to look at her as a nuisance. Her step-siblings appear to dislike her and feel afraid of her. Her stepmother seems to hate her and feel that she endangers the family by being only half-mortal. At the end of "The Lightning Thief", Annabeth returns to her family to see if she can get along with them. She is able to stay with them for approximately a year, but it is unknown if her feeling towards her family have changed; however, in "The Titan's Curse", her father and stepmother seem to care for her deeply, and her father helps fight off Kronos's army to save Annabeth.
Annabeth is a good fighter, and has been shown to be able to think on her feet in very hard situations. Despite this, Annabeth dreams of being an architect (building things), and the story has made many references to this. In "The Lightning Thief", she enjoys and quickly becomes addicted to the 3-D holographic SimCity-esque game at the Lotus Hotel and Casino, and in "The Sea of Monsters", it was shown that Annabeth’s greatest dream is to redesign the whole world to make it better, make Luke good again, and be accepted by her mother and father. In "The Last Olympian", she is granted the status of being the architect of Olympus.
Hubris, or deadly pride, is Annabeth's fatal flaw. Annabeth thinks that she is able to do anything: get her parents back together, build great monuments, and save Luke, as shown in the second book. She sometimes even thinks she can rebuild the world into an even better place than the immortals did. She also has a deep fear of spiders, (arachnophobia), due to the contest between Athena and Arachne.
Annabeth is described as being athletic and having curly blond hair (like a princess's), tan skin, and stormy gray eyes. Percy Jackson describes her as "cute" at first but eventually she becomes "seriously beautiful."
Annabeth first appears in "The Lightning Thief" and is twelve years old. She was nicknamed "Wise Girl" by Percy, in a spat of insults. The name was meant as an insult but, now it's an affectionate pet name.
She first meets Percy Jackson after he was attacked by the Minotaur and makes his way into Half-Blood Hill. When he first saw her, Percy described Annabeth as "pretty" with blond hair curled "like a princess" After Percy heals from the Minotaur attack, Annabeth hears that he is to go on a quest (search) and she wants to go along, thinking Percy is "the one" from The Great Prophecy. Together, she, Percy, and Grover go searching for Zeus's stolen lightning bolt. Throughout the book, Annabeth shows her unique intelligence, which she inherited from her mother, and also her arachnophobia (fear of spiders) that she shares with all her siblings on her mother's side (originating from the story of Arachne and Athena)
Annabeth, Percy and Tyson, having not been allowed to go on the quest for the Golden Fleece to save Thalia's Pine Tree and find Grover by Chiron's temporary replacement, sneak out of Camp Half-Blood to do so. During the book it is revealed that Annabeth's greatest dream is to redesign the whole world to improve it, save Luke (from himself), and be accepted by her mother and father. After getting stranded on the island of the Queen-Witch Circe, Annabeth saves Percy after he is turned into a Guinea Pig using the multivitamins given to them by Hermes. During the fight with Polyphemus Annabeth (while invisible with the use of her Yankee's Cap) pretends to be Nobody and distracts him long enough for Percy to vanquish him. Annabeth is injured fatally during the fight but is healed with the help of the Golden Fleece.
Annabeth is kidnapped along with the goddess Artemis and has to be saved by Percy, Thalia, Grover, and the huntresses Zoë Nightshade and Bianca di Angelo. In a dream Percy has, Annabeth is on a mountain, and she sees Luke holding up a black roof (unknown to Percy, it is the sky). Annabeth helps him hold it, and then Luke slips out from underneath, making Annabeth hold it. This is later used to trick Artemis into holding the sky, as Artemis would not be able to resist helping a maiden. Unlike the other books, Annabeth's role is quite small. It is hinted in this book that there will be a romantic future for her and Percy. Aphrodite, the goddess of love, also convinced Percy about his feelings for Annabeth, though she also made it even harder for them to fall in love. In the end, Percy saves both Annabeth and Artemis, while Thalia is fighting Luke until he falls off a cliff.
By this book, Annabeth is fourteen. Percy and Annabeth find an entrance into the Labyrinth. She realizes that Luke may try to use this entrance to invade Camp.
Annabeth leads the quest into the Labyrinth, fulfilling one of her ambitions. She goes into the Labyrinth with Percy, Grover, and Tyson to find a way to stop Kronos's evil forces from entering the borders of Camp Half-Blood by searching for the Labyrinth's inventor, Daedalus. The prophecy the Oracle gave her appears to have scared her and she refuses to say the last line. As they go into the Labyrinth, they face many hardships. Annabeth faces a Sphinx and finds the riddles (which are actually factual questions) not challenging and an insult to her intellect. They escape the claws of the Sphinx and continue on to find Hephaestus so he can tell them about where to find Daedalus.
As they head towards Hephaestus' forge in Mount St. Helens, they find telekhines there making a weapon for Kronos. Percy tells Annabeth to escape while she can. She kisses him for luck and they part ways. Annabeth believes that he dies when Mount St. Helens erupts, but this is not the case. Percy fell onto the island Ogygia, prison of the nymph Calypso, a daughter of Atlas. When Percy comes back to camp, Annabeth is performing a funeral ritual for him. When she notices him, she hugs him, making a scene. However, when she finds out about Calypso, she is very jealous. Percy then asks a mortal girl, Rachel Elizabeth Dare, to help them on their way through the Labyrinth (Rachel has a rare ability to see through the Mist). Annabeth becomes very jealous at how close Percy and Rachel are getting. The three of them discover Luke, who has become Kronos's vessel. After a battle, Luke is forced back into the Labyrinth, leaving two casualties. Annabeth refuses to believe that Luke is all bad, and gets quite mad at Percy for saying otherwise.
After they fulfilled their mission, Annabeth and Percy are standing on Half-Blood Hill, and are matching their goals with the prophecy, Annabeth reveals the last line of her prophecy, "To lose a love to worse than death" and is confused, not sure about her feelings for Luke, or a secret love for Percy. At the end she leaves with her dad to go to a private school in San Francisco.