Erik Hellstrom is a major antagonist in the Kingdom Hearts Unlimited Saga, appearing in "Return of the Keyblade" as a member of the Hellfire Organization and as the true employer behind Lt. Rourke and his band of mercenaries in the Atlantis campaign.
He allies himself with Maleficent's forces in order to restore glory to his name, destroy the worlds, and eventually rebuild them in his image under his tyrannical rule. However, it is for this reason that he eventually comes into conflict with the real Odin's adopted son Loki Laufeyson, and neice Hela Angrbodadottir.