Annabeth is a daughter of the Greek goddess Athena. At age seven, Annabeth ran away because she felt unwanted and hated by her father and stepmother. Annabeth and her new friends, Luke Castellan and Thalia Grace, traveled together for some time after she ran away from home before arriving at Camp Half-Blood. Her friend Thalia had sacrificed her life so that Annabeth and Luke could get to camp safely. During her time at the camp, she developed a father-daughter relationship with the camp activities director, the centaur Chiron. Before meeting Percy, she had been at the Camp for five years.
Inherited from her mother, the goddess of wisdom, Annabeth is a great strategist, full of wit, cunning, very intelligent and strong. Annabeth's personality is shown throughout the series to be practical and smart. She is a quick thinker, providing Percy a great deal of help in his quests, and most of the time, saves their lives. Annabeth can be cold towards others at first, shown in The Lightning Thief, when she first meets Percy, this eventually changes through the first book, as she eventually warms up to him and grows extremely protective of him. As shown in The Lost Hero and in The Son of Neptune, she is shown to be extremely worried about Percy's mysterious disappearance, desperately trying to find him. She can be sharp-tongued towards others, even the gods, shown when she insulted Hera for her selfish views on family. Annabeth can be sensitive when it come to promises, as she never forgets them, and she becomes greatly upset when Luke betrays Camp and breaks his promise to her. Being a child of Athena, Annabeth has arachnophobia, resulting from the story of Arachne, the woman who was turned into a spider by Athena as punishment for extreme arrogance. Annabeth's fatal flaw is hubris, which means "deadly pride." It was revealed in The Sea of Monsters when she and Percy encountered the sirens. Annabeth mentions this flaw as a common thing for children of Athena.