Miss Elvara: The school nurse. She has red eyes and a calm personality. She is skilled enough to bring dead students back to life. 170cm. Miss Ashatchu: The owner of the school cafe. She is kind and energetic. She can make 12 types of drinks, including Americanos. 170cm. Miss Bloomie: She has a utility knife fused to her left arm. She has black hair and is the shortest among the teachers. She is the science teacher. 168cm. She stabs failing students to death. Miss Thavel: The language teacher with creature-like hands. She has three alphabet blocks on her head and deer antlers. She is playful. She tears failing students to death. 251cm. Miss Bogurse: An electric snake beastman. A swimming teacher with sharp blue eyes and a red hard hat. She is very irritable. 330cm. Miss Sasha: Her left eye is a green book. She is the art teacher and also a kindergarten teacher. She is a kind teacher who doesn't kill students. 169cm. Miss Hinata: A religion teacher and kindergarten teacher. She is the tallest among the female teachers at 4m. She usually has her eyes closed, but it's said she's scariest when she opens them. She carries a sun ornament and a spear, and will stab anyone who touches the kindergarteners or fails. 4m. Miss Cledor: The librarian. She is quiet, with a key for a left arm and a lock for a left eye. She kills students who make noise. She likes Bloomie. 2m. Miss Emily: The history teacher. The only Black teacher, and she seems to have a cheerful personality.

Mr. Eclipse: Wears Anubis-style ornaments. He is a cheerful disco dance teacher. He is a shadow person like Sciz and once had his heart pulled out by Sciz. He doesn't get along with Hinata. Mr. Foxtrot: His left eye is an X, but when he's angry, it tears open to reveal a black sclera and red pupil. He is a cheerful, 4m tall, playful dance teacher with extremely flexible joints. He snaps the bones of failing students. Mr. Strontium: Wears a black gas mask and has long black hair. He is quiet, polite, and serves as Bloomie's assistant. He is a dragon beastman but lost his left eye and most of his power. His real name is Benedict. He doesn't really kill students. He uses a pseudonym to hide from his father. 253cm. Mr. Hotchkiss: The crafts teacher. His left eye is a letter and his left arm is a stapler. He is Barrel's husband and kills failing students. He has long black hair. 3m. Mr. Brumeyer: The janitor. He hates his job and kills students who litter. His left arm is a vacuum cleaner. He likes Cledor and has a short temper. 3m. Mr. Tron: A cute robot whose core is a blue slime. He is the mechanical engineering teacher. Mr. Demi: He has a crush on Sasha. He is a timid music teacher. 180cm. Mr. Sciz: The anatomy teacher. He carries large scissors, is obsessed with Barrel, and is a bit of a madman. 2m. Mr. Bane: With a red halo and a pair of wings, he looks like a mix of a demon and an angel. He is the vice principal and, unlike the principal, is kind and polite. 281cm. Mr. Eugene: The PE teacher. He seems to have a gentle personality. He doesn't appear to kill students. His left arm is a golf club.

298cm. Has a compass fused to her left arm. The math teacher. She loves Oreos immensely. She pressures students who fail and kills them with her compass. She has a playful side and is in a relationship with Compass.

190cm. A weapon-type human. Assistant math teacher. He looks very similar to Circle, but they are not siblings. He can transform into the compass fused to Circle's left arm. He likes KitKats.

The Principal. 189cm. She is cold and has two horns, though one is broken. She is a caffeine addict and is very overbearing, but she completely ignores the murders committed by the teachers. She isn't a monster, but the teachers can't mess with her.

A bat beastman. The security guard. 518cm. He speaks politely and is kind yet timid. He has bat wings and ears and is in a same-sex marriage with Hotchkiss. His left eye is a monitor, so he displays his emotions through emoticons. He is on the students' side and likes s'mores. However, he becomes monstrously cruel toward intruders.

Twins. Safety officers. 281cm. Redhalt: Has red sclera and long black hair. He is realistic and blunt. He wears a white cap and has white skin. Greenmile: Has green sclera and long black hair. He is energetic and playful. He wears a black cap and has black skin. When they get angry, their hair blazes like fire. They move around on roller skates. They can transform their left arms into gun barrels. They hate bad students.