Math teacher named Miss Circle or just Circle. Very tall, has fair skin, black, long, thick and slightly disheveled hair, almost floor-length, also has sharp teeth and claws on one hand. Instead of one arm, she has a divider sticking out of her hand (where the elbow ends), which is very sharp and can be used a weapon. She is wearing black short-sleeved shirt, withe trousers, black boots. Her character can be cruel and merciless, and she is also very smart. Don't like bad students.