The Devil

Satan or The Devil is the (usually horned) personification of evil in many (particularly Human) mythologies, and is of a similar form to many gods of other races such as the Draconians and the Kaleds, the latter having a horned god of war. (DW: The Satan Pit)

In reality, Satan has various origins in many species, such as the Dæmons, a horned race from the planet Dæmos, Sutekh of Phaester Osiris, the Greek Immortal Hades and an ancient, unnamed race of Demon from the Pre-Universe, of which at least two members survived into this universe, The Beast and his son, Abaddon. (DW: The Daemons, Pyramids of Mars, The Satan Pit, Deadly Reunion TW: End of Days)