Proserpexa, also referred as "Sister of the Dark", was a powerful demoness, presumably a Lower Being, whose worshippers attempted to destroy the world in 1932, only to be stopped and killed by an earthquake that also swallowed her Temple. She was depicted in her effigy as a humanoid demon with forked tongue and clawed hands. In 2002, Willow Rosenberg attempted to eliminate all life on earth and burn the planet to cinder using the Proserpexa's effigy.