Principal Toenail of Satan  

, サタンの足の爪

The primary antagonist is the Academy's corrupt principal who wears a terrifying white demon mask and jester hat. He derives pleasure from sexually embarrassing female students, particularly Mayumi Takahashi. This frequently places him at odds with Kekko Kamen, whose true identity he seeks to expose. To achieve this goal, he employs different punishment counselors to publicly humiliate Takahashi, using her as a lure to reveal the naked warrior of justice.