Claire: Female student. Has a large ribbon on the back of her head. Engel: Male student. Tied hair with a feather stuck in it. Has creature arms. Moe Moe: Claire's cat. Bubble: Female student. Her entire body is made of soap. Lana: Female student. Has puppets on both hands. Abbie: Male student. Has a crush on Lana. Oliver: Bully. Dating Alice. Male student. Left arm is a pencil. Zip: Female. Part of the bully group. Has a younger brother named Chip. Has a dragon tail and wings. Edward: Male. Part of the bully group. Has demon horns and a tail. Skilled in engineering. Kevin: Male. Model student. Carries a book on his head. Petunia: Rabbit demi-human. Popular girl. Female student. Lizzy: Popular girl. Female. Wears a crown. Cubbie: Cat demi-human. Body is a pencil sharpener. Male student. Robby: Male. Short in stature. Appears skilled in engineering. Ruby: Female. Has a TV for a head and a plug tail. Riley: Female. Has a crush on Oliver. Always carries a kitchen knife. Psycho. Skell: Male student. Always looking at his phone. Goth look.

Miss Circle: Female. Math teacher. Loves Oreos. Left arm is a compass. Miss Bloomie: Female. Science teacher. Left arm is a box cutter. Miss Thavel: Female. Language teacher. Has creature arms. Grows deer antlers and a tail when angry. Miss Grace: Female. Principal. Strict. Has horns, but the left one is broken. Mister Demi: Male. Music teacher. Timid. Has pencil horns. Miss Sasha: Female. Art & Kindergarten teacher. Left side of her face is covered by a book. Miss Emily: Female. History teacher. The only teacher with dark skin. Mister Compass: Male. Assistant math teacher. Has creature arms.

- Female - Isolated student - Resides in a room labeled 'Alice's Room' - Brown hair - Oliver's girlfriend - Wears a crown - Kills anyone who enters with spikes, tentacles, etc. - Can transform; when transformed, she grows in size, her body turns completely black, tentacles sprout, and her eyes turn red.

Magret: Female, wears scissors like pins, energetic, Marvin's younger sister. On bad terms with Ram. Marvin: Male, blunt, likes eating chocolate. On bad terms with Ram. Scotch: Female, wears a pink maid outfit, likes crafting. Kind. Ram: Male, monitor head, likes doodling, on bad terms with Marvin and Magret. Basilus: Male, popular guy, jealous of Mister Barrel, arrogant. Eunji: Female, Basilus fan, views Basilus as a prince who will save her. Robert: Male, skilled at making robots and machines, blunt? Edgar: Male, purple hair, blunt. Always expressionless, part of the occult group. Wilbur: Male, irritable, occult group, always looking for the Necronomicon. 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 demi-human who loves swimming. Pupu: Female, timid and cute. Mister Barrel: Male, security guard, very tall, kind to students and teachers (except intruders), Hotchkiss's husband. Mister Hotchkiss: Male, craft teacher, Mister Barrel's husband, kills failing students. Mister Brumeyer: Male, janitor, kills students who make a mess, has feelings for Miss Cledor. Miss Cledor: Female, calm, librarian, kills students who are noisy. Mister Tron: Male, a small and cute robot engineer. True form is a slime. Mister Sharply: Male, astronomy teacher, always has a smiling face. Mister Foxtrot: Male, looks like a ball-jointed doll, dance teacher. Miss Borgus: Female, a giant sea serpent swimming teacher, often gets angry during lessons. Mister Eugene: Male, PE teacher, sometimes looks after the students. Mister Vane: Male, Vice Principal. Miss Elvara: Female, school nurse, can resurrect dead students. Alarm Brothers: Male, red lights of a traffic signal, bodies have opposite colors, Ram's worst counters. Miss Hinyata: Female, kindergarten teacher, loves Mister Sharply, kills students who mess with the kindergarteners. Hansel: Male, Wendigo, Lord, used to be friends with Mister Barrel but isn't anymore, obsessed with Mister Barrel. Belial: Male, high-ranking politician, gentle, kind. Mister Camera: Male, kind. Mister Speaker: Male, energetic. Mister TV: Male, reticent. Mister G-Man: Male, normal person, mentally strong.