Hades is the reincarnation of the Greek god, and the older brother of Poseidon. After he was reincarnated due to humans straying from worshiping the gods, Hades had to start over with a childlike appearance and was taken in by the Former Demon King Oxenthree, who raised him alongside his own son (Twilight), and Hades's younger brother who also reincarnated, Poseidon.

He lives in the former Demon King Castle and frequently butts heads with Twilight whenever they talk. Despite Hades teasing him a lot, Poseidon secretly idolizes him. Hades often acts as a voice of reason when others around him are panicking, though he seems to have a blind spot when it comes to Princess Suya's shenanigans.