Hades is a mythological deity and serves as the primary antagonist in the last story arc of Saint Seiya. His name means "the unseen". His pet is the three-headed dog Cerberus
In the story, Hades is the ruler of the Underworld and old enemy of Athena. He wishes to wipe out humanity, turning the Earth into a desolate wasteland. Orphée described Hades as a prudent deity. He despises the human beings, who are each time more ungrateful towards the gods.
Hades is one of the most powerful deities in the Saint Seiya Universe, being Zeus' oldest brother. As the God of the Underworld, Hades can allow his specters to travel from the Underworld to the Living World, also, he can resurrect any living being at will (as he did with his deceased Specters, and Cerberus during The Lost Canvas series).
As usual, he uses an avatar when he returns to Earth, but it must be the purest soul on earth. Hades stores his mythological body and his Surplice in Elysion, and is kept in a marble tomb while defended by the minor deities Thanatos and Hypnos.
When the Bronze Saints attack his tomb, he returns into his body. Being a deity he is a possessor of the Big Will (Divine Cosmo) but, unlike his brother Poseidon in the Saint Seiya series, he could use all the power of his Divine Cosmo.
In the story "The Pendulate War" he be married with Persephone and have 11 children with her.