Female Height: 290cm Age: 38 A math teacher and 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. Fitting her name 'Circle', her left arm is a sharp compass (that compass is Mr. Compass). She loves Oreos very much. The things on her head are horns, not animal ears; since the horns look like cat ears and she often has a 'cat mouth,' the fandom sometimes depicts her as a cat. She is in a relationship with Mr. Compass; they fight occasionally but are a lovey-dovey couple. She has long, pointed black hair that reaches down to her knees.

Male Height: 290cm Age: 39 He is the compass attached to Miss Circle's left arm and can transform into a compass. He looks very similar to Miss Circle. Both of his arms have large black hands with sharp claws. He loves KitKats very much. He is in a relationship with Miss Circle; they fight occasionally but are a lovey-dovey couple. He has shoulder-length black hair.