A cute girl with brown hair wearing a tiara. If you enter Δlice's room, you will be killed and eaten by her. She basically never leaves her room, but on the rare occasions she does, all the students tremble in fear. Her main diet is animals, but she can eat humans and insects too. The inside of Δlice's room is a continuous black space. The door is made of a blue wood-like material with a sign on the top half that says "Δlice room." She speaks in a blunt, assertive manner (using "da" and "darou").

He has "A+" written on his head and wears his long hair tied back. He has horns shaped like cat ears. At first glance he looks like a girl, but he is a boy. He is the leader of the bully group and has the best grades. He is close with Zip and Edward. He is dating Δlice and loves her dearly—so much so that he would offer his own eyeballs or heart to her if she were hungry.

She is often teased because her name is the same as the ZIP news program. She has black and white hair with "2+2=8" written on her head. She has good grades and is a girl. A member of the bully group, she is close with Oliver and Edward. She is Chip's older sister. She loves cute things. She has a crush on Claire but keeps it hidden.

He has long white hair and wears glasses on top of his head (maintaining a perfect balance). He has demon horns and a tail. He is great at science and loves building machines. He has good grades and is a member of the bully group. He is close with Oliver and Zip.

A female math teacher. She loves Oreos. If you give her Oreos, she will forgive any mistake. She has very eccentric long hair, narrow cat-like eyes, and her left hand is a giant compass. Her mouth is usually shaped like a cat's, but when she turns violent, she reveals sharp fangs. She will come to kill you if you get a D or lower on a test. She is 230cm tall.

She wears professional teacher's attire. She has sharp claws on her right hand and a left arm that has become a giant box cutter, along with a forked tongue. She will come to kill you if you get a D or lower on a test. She likes Claire and nearly has a nervous breakdown if Claire dies. She is a female science teacher.

A female language teacher characterized by the claws on both hands. She will come to kill you if you get a D or lower on a test.

A female student. She is friendly toward Guest. She isn't very bright, only occasionally getting an A. She is the target of the bully group.

A boy with long white hair tied in the back and hair ornaments made of blue and orange feathers. His grades are decent. He is close with Claire and friendly toward Guest.

She wears a green suit and a black skirt. She turns a blind eye to the murders committed by Miss Circle and the others. If you ask for a student's name, she will tell you their dormitory room number. She is female.