List of Percy Jackson and the Olympians characters
Daedalus: Inventor of the Labyrinth and son of Athena, he killed his nephew and took his notes, which he then used to cast his animus (soul) into automatons after Athena branded him with the murderer's hand. He originally owned a hellhound named Mrs. O'Leary and fights the Titan army toward the end of the fourth book. He later decides that it is time to go to the Underworld and leaves. He gave his laptop to Annabeth. It is filled with his notes and ideas.