Kishi The Kimbundu people of Angola believe in a fast and agile vampiric AQUEOUS DEMON named kishi. In its true form it has two heads or appears as a hyena with large teeth and powerful jaws. It can shape-shift into a man or a skull. In its human guise it will take a wife and impregnate her as quickly as possible. After she gives birth to its child, the kishi will kill her. It will then raise the two-headed monstrosity (one head of a man and the other of a hyena) in its home under the sea, where the child will become a ﬂesh eater like its father.
Encyclopedia of Demons in the World