Kiyo

Kiyohime (清姫) (or just Kiyo) in Japanese folklore is a character in the story of Anchin and Kiyohime, which dates back to the 11th century. In this story, she fell in love with a Buddhist monk named Anchin, but after her interest in the monk was rejected, she chased after him and transformed into a serpent in a rage, before killing him in a bell where he had hidden in the Dōjō-ji temple.