The Succubus is a secondary villainess in the 2003 Playstation 2 hack 'n' slash game "Castlevania: Lament of Innocence", aka. "Castlevania". She is the boss of the "Ghostly Theatre" stage.
The Succubus disguises herself as Sara, the love of Leon Belmont, the game's protagonist. He quickly sees through her charade, however, and then proceeds to both battle and kill her.