the main villain of the Kekko Kamen franchise, acting as the principal of Sparta Academy and issuing the harsh punishments (mostly stripping them) to students who don't meet the academy's strict criteria. He always attempts to find out Kekko Kamen's secret identity but ends up failing most of the time. He was also known for breaking the fourth wall a couple of times. He is extremely perverted and obtains satisfaction from sexually humiliating the female student body, especially Mayumi Takahashi.