A Kokuri Baba is a type of ghoulish yokai-hag who would haunt old temples and feed on the flesh of the dead as well as any who happened upon them.
Being considered a personification of evil, isolation and despair due to their origins as wives of old temple priests who upon the deaths of their husbands went insane and locked themselves in the deepest sectors of the temples, where they would transform into the predatory Kokuri Baba.