Percy Jackson is the son of Poseidon and Sally Jackson. He is the principal character in the Percy Jackson & the Olympians series. During The Titan’s Curse, Percy is 14 and is extra mindful of the prophecy stating that one of the children of the Big Three—Zeus, Poseidon, and Hades—will have the power to either save Olympus or to destroy it on their 16th birthday. The added pressures of this prophecy on top of his already distant relationship with his father is at the forefront of Percy’s development of this novel, which is at the exact center of the series. At one point, as Dr. Thorn tells Thalia that she will be the half-blood of the prophecy, Percy feels a sense of relief knowing that it isn’t about him, but when she later joins the Hunters to prevent herself from turning 16 and when he discovers that Nico di Angelo is a son of Hades, he claims the prophecy for himself, not wanting Nico to have to go through yet another trial after losing his sister.

Percy is impulsive, often diving into battle before a plan has been formed or without waiting for his friends. This often puts him in a sticky situation, as it did with Thalia at the beginning when Annabeth went missing and later with the majority of Camp Half-Blood during Capture the Flag.