is a kappa who, a thousand years before the events of the story, caused so much trouble that a monk sealed her away. She was a troublesome youkai, that would eat farmers' cucumbers. So much a Buddhist monk would be called to deal with her. The monk tried to talk her out of her misdeed, but she refused, They would often fight, and they slowly became friends. But eventually heretic Buddhist monks focused on destroying Yokai appeared, as Tohno and the kind monk ran, he sealed her to protect her, when the heretics would disapper. Mei Mei would freed her when she left the circus and became close friends. Tohno is supposedly a skilled enough warrior to defeat Pandaro, the Eastern Leader. Tohno asks as Mei Mei older sister, protecting and helping her. She dislikes that Ikuto refuses to believe that she is a Kappa, but is ready to believe science fictional stories, like aliens.