Hypnos is a major antagonist of the Saint Seiya franchise. He's the god of sleep who resides in the Elysium. Hypnos is a major antagonist of the Saint Seiya franchise. He's the god of sleep who resides in the Elysium he's one of the two most loyal and powerful servants of the god of the underworld Hades, helping him in his purpose to wipe out humanity and take control of the earth his Hobby Plays flute, Plays chess he is a calm, rational, and cold god he's the most loyal Servant devoted to Hades