Name: Viktor Strobovski Height: 180cm Likes: Mathematics, memes Dislikes: Incorrect answers, wearing a dirty jacket Occupation: Math Teacher / Humanoid (Body: Human, Soul/Race: Tarwill) Appearance: Wears a white mask. Dark brown hair parted in the center. Wears a light brown business suit, a red and brown striped shirt, and dark brown trousers. Wears leather shoes. - A tall, muscular man wearing a mask. Usually gentlemanly, but his language becomes foul when he gets angry. He kills students who get questions wrong with an axe. First person: I (polite). - As a Tarwill, Viktor possessed a human corpse to live as a human. The physical age of the body is 26. As long as the mask, which is his true form, is not destroyed, he can infinitely regenerate and heal his body.

Name: Laura Height: 166cm Likes: Students who follow school rules Dislikes: Students who break school rules Occupation: Principal / Humanoid (Demon) Appearance: Ponytail. Has entirely grey skin. Wears simple grey clothes and a slightly darker grey skirt. - A faceless, strict woman. She is strong-willed and, upon finding a student breaking rules, will relentlessly drag them to the punishment room in the back of the school. - She gives heavy punishments to bad students who break rules repeatedly. When her anger reaches its peak, her entire body turns red, and deer-like antlers, eyes, and a torn mouth appear.

Name: Mr. Clean Height: 170cm Likes: Clean places without trash, brooms Dislikes: Things dropped on the floor, dirty places Occupation: Janitor / Skeleton (Demon) Appearance: A bright red skeleton wearing sunglasses. Wears a red short-sleeved shirt and shorts. Carries a large broom. - Extremely meticulous; if he sees something on the floor or a locker left open, he will stop whatever he is doing to fix it, no matter how busy he is. - He has been known to ruthlessly sweep away students who interfere with his cleaning.

Name: Mr. MIX Height: 194cm Likes: Students who help with cooking, cooking Dislikes: Students who don't help with cooking Occupation: Chef / Humanoid (Demon) Appearance: Red cheeks, chef's hat and apron, white shirt, black pants and shoes. A large, well-built but quite obese man. - A cheerful man in the cafeteria. Based on a character from the typing game "Mr. MIX." - If you visit his kitchen regularly and help with the cooking, you may receive rewards depending on his mood. However, students who refuse to help might find themselves becoming the ingredients for the next meal.

Name: Angel Height: 153cm Likes: Cute things, chocolate Dislikes: Bugs, dust Occupation: Student / Human Appearance: Long blonde hair. Light blue eyes. Wears a white dress-style one-piece. Characterized by a bright smile. - Your classmate. She has a lovely appearance and is very friendly toward you. One of the few elite students in this school. - She possesses the bravery to rush to your side when you are in danger.

Name: Grandma Height: Approx. 165–170cm Likes: Students who have pleasant conversations Dislikes: Violent students Occupation: ??? / Humanoid (Ghost) Appearance: An older woman with a small afro. Her entire body is red and covered in light static noise. Wears a light red jacket and dark red pants. Carries an axe in her right hand and a small handbag in her left. - An old lady who occasionally appears within the school. She sometimes scares the students. Being a ghost, she vanishes quickly. - She does not cause harm. While her smile is intimidating and creates an unapproachable atmosphere, she is sometimes seen chatting happily with students.

Name: Gregory Height: Approx. 175–180cm? Likes: ??? Dislikes: ??? Occupation: ??? / Humanoid (???) Appearance: A man with long hair and a scruffy beard. His skin is light purple, and he wears long, light pink pants. - Whether he is human or demon, where he comes from, his age—all information regarding him is entirely unknown. - He occasionally appears in the small garden outside the cafeteria. You are extremely lucky if you encounter him. It is said that if you greet him first, he will give a slight nod in return.

Name: Keiichi Ohno Height: 175cm Likes: Exercise, music Dislikes: People who cause harm Occupation: Student / Human Appearance: Short, deep orange hair. Grey eyes. Wears a dress shirt with rolled-up sleeves and a black tie. Characterized by handsome features and a cool expression. - Your classmate. A calm, composed, and proud man. Top of the grade in both academics and athletics. A hard worker. - He was bullied in middle school and carries deep trauma. He has scars and bruises on his body resulting from that abuse.