15 years old 160cm Female Student Appearance: She has short brown hair with a green ribbon and wears a white shirt with brown shorts. She wears striped socks and red shoes. Personality: She is kind and bright but is easily frightened and becomes anxious about her surroundings. Grades: She tries hard to study, but her grades are not particularly good. Relationships: She is a close friend of Engel and experiences various incidents in school life.

15 years old 172cm Male Student Appearance: He has long white hair tied low, with blue and orange feather decorations on his head. He wears a white shirt, black overalls, striped leg warmers, and black shoes. Personality: He is kind and gentle, and he takes good care of his friends. He has a strong tendency to try and help friends who are in danger. Grades: There is no specific setting for his grades being good or bad; they are average. Relationships: He is Claire's friend and is shown trying to protect her.

15 years old 165cm Female Student Appearance: She has long gray hair tied in a ponytail and wears sock puppets with eyeballs on both hands. She wears a gray collared t-shirt over a black long-sleeved shirt and dark gray pants. Personality: She is kind, gentle, and sociable. She struggles with studying but enjoys learning. Grades: Low. Relationships: She gets along well with other students.

15 years old 174cm Male Student Appearance: He has short black hair with something like an apple stem on top. He wears a white shirt, a black vest, and a tie. He wears white shorts, socks, and black shoes. Personality: He is timid, easily frightened, and tends to be anxious. Grades: He is weak at studying, and his exam scores are low. Relationships: He likes Lana and also spends time with other students like Claire and Engel.

19 years old 182cm Male Student Appearance: He has long white hair tied with a black ribbon, black horns, a white shirt, and a black vest and shorts. His left arm is in the shape of a pencil, and 'A+' is written in red on his head. Personality: He is playful and mischievous, often bullying other students. Grades: Excellent, at an A+ level. Relationships: He acts together with Zip and Edward.

16 years old 163cm Female Student Appearance: She has long two-tone black and white hair, wears white clothes and a poncho, and black boots. She has a pointed tail, and '2+2=8' is written on her head. Personality: She is very playful and mischievous. Grades: Good. Relationships: She hangs out with Oliver and Edward.

16 years old 177cm Male Student Appearance: He has long white hair with two black horns and round glasses. He has black arms and legs, and what looks like a demon tail. He wears a black and white school uniform. Personality: He is playful and mischievous, enjoying teasing other students. He is very interested in machinery and technology and likes to build new things himself. Grades: He is good at studying, especially in fields related to technology. Relationships: He is close with Oliver and Zip, and the three of them often playfully bully other students.

38 years old 290cm Female Math Teacher Appearance: She has long black hair and black horns, and wears a white shirt and black pants. Below the elbow of her left arm is in the shape of a giant compass. Personality: She has a playful and humorous side, but she is extremely strict about lessons and grades. Features: She likes Oreos and hates KitKats. She engages in cannibalism, such as killing students with the compass on her left arm and eating their heads.

36 years old 178cm Female Science Teacher Appearance: She has short black hair and black horns, and wears a black and white teacher's outfit. Her left forearm is in the shape of a large box cutter. Personality: She is calm and quiet but strict about students' grades. Features: She has a forked tongue like a snake. She kills by stabbing or slashing with her box cutter.

30 years old 225cm Female Language Teacher Appearance: She is characterized by shoulder-length black spiky hair and A, B, and C blocks on top of her head. She wears a white dress and black shoes. Personality: She has a playful and energetic side but is quite strict with the students. Features: Her hands are shaped like large black claws.