Miss Circle was leading the class on the math question and if they got an F, She would kill and torture them before the student even dies (and eat (?) them; No one in class or school knows this). Instead og her left hand, she has a huge circle (compass), with the help of which she kills students. She has long black hair that reaches about her knees(?), and she is about 180-190cm tall,big breasted and yandere

KAAATIE's character from youtube 