Abbie: A male student with slightly long black hair and long sideburns, characterized by a white apple-stem ribbon on his head. He struggles with his studies, wears a school uniform, and has a timid personality. Lana: A female student with a gray ponytail who is friends with Abbie. She is not good at studying. She wears a patched clothing style and has sock puppets on her hands. Claire: A kind female student with a white bob cut and a white ribbon on the back of her head. She wears a white long-sleeved top and white shorts. Engel: A kind and smart male student with long white hair and blue and red feathers tucked into it. He wears a white shirt with black overalls and suspenders. He is characterized by a short, fluffy white tail, white leg warmers, and black pointed hands. Bubble: A kind and smart female student with white bubble hair and a black pinafore dress. She has a yellow rubber duck and a blue toothbrush on her head, a white bubble tail, and large eyes with white stars in the pupils.

Oliver: The leader of the bullies. A male student with long white hair, a black ribbon, and a red A+ stamp on the left side of his head. He has black horns, a pair of white cowlicks (ahoge), and a large white pencil for a left arm. He likes eating soap, is smart, and is dating Alice. He bullies or kills students with paper balls. Zip: A female bully with a white dragon tail and a white cape featuring drawings of a smiley face, a house, and a tree. She has two-toned black and white hair in a ponytail with a swirly cowlick and black pointed hands. '2+2=8' is written on the white side of her hair. She bullies students with paper airplanes. Edward: A male student who loves science. He has long, spiky white hair like a porcupine, black demon horns, and a tail. He bullies students using a drone with claw arms.

[Teachers who kill failing students] Miss Circle: A 3m tall math teacher who loves Oreos. Her left arm is a giant compass. She wears a black short-sleeved shirt, long white jeans, and low-heeled black boots. She has a pair of black horns, cat-like thin pupils, and a sharp black right hand. Miss Thavel: The youngest of the teachers and a language teacher. She wears a white block flower crown with A, B, and C on her head. She has a swirly cowlick like Zip, sharp black hands, black shoes, a white short-sleeved dress shirt, and a long white skirt. She is a Wendigo. Miss Bloomie: The shortest science teacher. She has a black bob cut with a white ribbon and a short ponytail. Her left arm is a giant white box cutter. She wears a black long-sleeved shirt, has a sharp white right hand, a long white skirt, and black stockings. Miss Grace: The principal of the school. She has a calm and cold style. [Teachers who do not kill failing students] Miss Sasha: An art and kindergarten teacher. A kind female teacher with a black ponytail and a rainbow ribbon. Mister Demi: A music teacher and the only male among the staff. He has a timid personality and slightly long white hair with small piano keys in it. He has black pointed hands and thin-rimmed glasses. Miss Emily: A kind history teacher. She is a Black woman with slightly permed hair, black pointed hands, and glasses.

A typical womanizer who uses his good looks to flirt with the female students. He is handsome, gets annoyed easily, but is only kind to girls. He loves compliments and is unnecessarily good at studying. He hates male students—hates them with a passion. A wolf-beastman with a bad attitude. He has white half-parted hair, black wolf ears, a black tail, and black pointed hands. He wears a long white dress shirt with a black V-neck sweater and long black pants.

A dangerous individual and a humanoid creature. She has a brown bob cut, a white crown, a long blue shirt with white trim, and a long black skirt. She has some scars and is dating Oliver. She kills anyone who enters her room (except Oliver, Zip, and Edward). She is isolated in her room (Alice's Room) but occasionally comes out.