Female 40 years old Principal. She has a piece of paper with a triangle drawn on it attached to her right horn, and her left horn is broken. She wears a monocle. Curiously, the scar on her forehead is identical to the one Miss Thavel gets when she transforms into a deer. She has a cold and strict personality. Her hair is white and tied in a large tail shape, with two small hairpins in her right bangs.

Female Height: 290cm Age: 38 years old Math teacher. She is a strict disciplinarian with a coercive and cruel personality (though she occasionally shows a clumsy or playful side). She possesses superhuman strength, capable of smashing desks or walls and piercing a student's skull with a compass in one go. True to her name 'Circle', her left arm is a sharp compass. She kills failing students. She loves Oreos very much. The things on her head are horns, not animal ears. Because her horns look like cat ears and she usually has a cat-like mouth, the fandom sometimes depicts her as a cat. She has long, pointed black hair that reaches down to her knees.