Perseus Percy Jackson is a character in Percy Jackson and the Olympians series, a video game, and a film. Percy is an eighteen-year-old greek demigod, born in a family of Poseidon, the Greek god of the seas, and mortal Sally Jackson who could see through the Mist. His father Poseidon left them when Percy was just a baby to protect him and his mother from Zeus. Percy was attacked by a snake but managed to survive like another demigod Hercules who is known in Roman mythology. A fanart book custom progress bar for YouTube with Percy Jackson.