Claire: Female. Short hair with a ribbon. Kind and friendly. Has a cat named Moe-Moe. Close with Engel. Engel: Male. Has two feathers in his hair. Tied-back hair. Kind and gentle. Close with Claire. Bubble: Female. Energetic and bright. Has a toothbrush and a rubber duck on her head. Close with Claire and Engel. Lana: Female. Energetic and playful. Has sock puppets on her hands. Has an ahoge (cowlick). Abbie: Male. Timid and shy. Has an apple stem ribbon on his head. Oliver: Male. Bully leader. Dating Alice. Sociopath, eats soap. Gets many A+ grades. Zip: Female. Bully. Likes flying paper airplanes. Has a dragon tail. Has a 5-year-old brother named Chip. Gets many A+ grades. Edward: Male. Bully. Good at engineering. Gets many A+ grades. Petunia: Female. Popular girl. Close with Lizzy. Rabbit-kin. Lizzy: Female. Popular girl. Close with Petunia. Kevin: Male. Bold. Model student. Cubbie: Male. Timid. Model student? A cat-kin whose body is a portable pencil sharpener. Tail looks like pencil shavings. Robby: Male. Good at engineering. Riley: Female. Psychopath. Has a crush on Oliver. Ruby: Female. Has a monitor head. Kind, gentle, and sane. Skel: Male. Always looking at his phone. Phone addict. Magret: Female. Has scissors as hairpins. Energetic. Marvin's younger sister. On bad terms with Ram. Marvin: Male. A bit blunt. Likes eating chocolate. On bad terms with Ram. Skatch: Female. Wears a pink dress. Likes crafting. Kind. Ram: Male. Monitor head. Likes doodling. On bad terms with Marvin and Magret. Basilous: Male. Popular guy. Jealous of Mr. Barrel. A bit arrogant. Eunji: Female. Fan of Basilous. Considers him a prince who will save her. Robert: Male. Skilled at making robots and machines. Blunt. 174cm tall. Edgar: Male. Purple hair and blunt. Always expressionless. Occult group. Wilbur: Male. Irritable. Occult group. Always looking for the Necronomicon. Occult group. Akatsuki: Female. Believes in God. Gregory: Male. Horror enthusiast who loves scary things excessively. Occult group. Ellie: Female. Alien girl interested in space. Muro: Male. Shark-kin who loves swimming. Pupu: Female. Timid and cute.

Miss Circle: Female. Disciplinarian, coercive, and cruel. Kills failing students with the compass on her left arm. Likes Oreos. Math teacher (can be playful at times). Mr. Compass: Male. Can transform into Circle's compass. Likes KitKats. Miss Circle's lover. Miss Thavel: Female. Kills failing students with her creature hands. Has three alphabet blocks on her head. English teacher. Miss Bloomie: Female. Slashes failing students to death with the box cutter on her left arm. Science teacher. Miss Emily: Female. Black. History teacher (does not kill students). Miss Grace: Female. Principal. Strict and cold. Mr. Demi: Male. Timid. Music teacher (does not kill students). Miss Sasha: Female. Kind and sweet. Art and kindergarten teacher (does not kill students). Mr. Barrel: Male. Security guard. Very tall. Kind and gentle to students and teachers (except intruders). Hotchkiss's husband (gay). Mr. Hotchkiss: Male. Craft teacher. Mr. Barrel's husband (gay). Kills failing students. Mr. Brumeyer: Male. Janitor. Kills students who make a mess. Has a crush on Miss Cledor. Miss Cledor: Female. Calm. Librarian. Kills students who make noise. Mr. Tron: Male. Small and cute robotics engineer. True form is a slime. Mr. Sharply: Male. Astronomy teacher. Always has a smiling face. Mr. Foxtrot: Male. Ball-jointed doll appearance. Dance teacher. Miss Borgus: Female. Giant sea serpent swimming teacher. Often gets angry during swimming lessons. Mr. Eugene: Male. PE teacher. Sometimes looks after the students. Mr. Vane: Male. Vice-principal. Miss Elvara: Female. School nurse. Can resurrect dead students. Miss Hinyata: Female. Kindergarten teacher. Loves Mr. Sharply. Kills students who mess with the kindergarteners. Works with Miss Sasha.

Alice: Female. Creature. Dating Oliver. Ruthlessly kills anyone who enters her room (except Oliver, Zip, and Edward). Isolated (has her own containment room, though she comes out occasionally). Hansel: Male. Creature. Obsessed with Barrel. Often fantasizes about Barrel.

Chip: Male. 5 years old. Zip's younger brother. Kindergartener. Freya: Male. Dreams of being a princess. Wears a princess dress. Yata: Male. Crow. Three-legged. Coward. Tsuru's younger brother. Tsuru: Female. Crane. Not very close with Yata. Yata's older sister.