Bat beastman, Security Guard, 518cm. He uses polite speech and is kind yet timid. He has bat wings and ears, and his left eye is a monitor that displays emotions via emoticons. He can fuse a gun barrel into his left arm. He turns into a monster when facing intruders. He is on the students' side and loves s'mores. However, he becomes monstrously cruel toward intruders. He has long white hair tied back and a long black tail.

298cm, left arm fused with a compass, Math teacher. One of the top three teacher trio (along with Thavel and Bloomie) and loves Oreos immensely. She kills students who fail with her compass. She has a playful side and is in a relationship with Compass.

The compass on Circle's left arm, possessing blue eyes. Aside from having shorter hair, he resembles Circle, but they are not lovers; he likes KitKats. He usually appears as a compass with a single blue eye.

Principal, 189cm. Calm with two horns, though one is broken. She is a caffeine addict and authoritative, but she completely ignores the murders committed by the teachers. She isn't a monster, but the teachers cannot touch her.

Mr. Eclipse: Wears Anubis-style ornaments, a cheerful Disco Dance teacher. A shadow person like Scythe, who once had his heart ripped out by Scythe. He is on bad terms with Hinata. Mr. Foxtrot: Has an 'X' for a left eye; when angry, it tears open to reveal a black sclera and red pupil. A cheerful 4m tall dance teacher with flexible joints. He snaps the bones of failing students. Mr. Strontium: Wears a black gas mask and has long black hair. Quiet, polite, and serves as Miss Bloomie's assistant. A dragon beastman who 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: Crafts teacher with a letter for a left eye and a stapler for a left arm. Kills failing students and has long black hair. 3m. Mr. Brumeyer: Janitor who hates his job and kills students who litter. His left arm is a vacuum cleaner; he likes Cledor and has a short fuse. 3m. Mr. Tron: A cute robot whose core is a blue slime; Engineering teacher. Mr. Demi: Has a crush on Sasha; a timid Music teacher. 180cm. Mr. Scythe: Anatomy teacher who carries large scissors; obsessed with Barrel and slightly insane. 2m. Mr. Vane: Has a red halo and a pair of wings, looking like a mix of angel and demon. Vice-principal who, unlike the Principal, is kind and polite. 281cm. Mr. Eugene: PE teacher with a seemingly gentle personality. Doesn't appear to kill students; his left arm is a golf club.

Miss Elvara: School nurse with red eyes and a calm personality. Highly skilled, capable of reviving dead students. 170cm. Miss Ashatchu: School cafe owner, kind and energetic. Can make 12 types of drinks including Americanos. 170cm. Miss Bloomie: Left arm fused with a cutter blade; has black hair and is the shortest among the teachers. Science teacher. 168cm. Stabs failing students to death. Miss Thavel: Language teacher with creature-like hands. Has three alphabet blocks on her head and deer antlers; playful. Rips failing students apart. 251cm. Miss Bogurs: Electric eel beastman, Swimming teacher with sharp blue eyes and a red safety helmet; very irritable. 330cm. Miss Sasha: Left eye is a green book; Art teacher and Kindergarten teacher. A kind teacher who doesn't kill students. 169cm. Miss Hinata: Religion teacher and Kindergarten teacher, the tallest female teacher at 4m. Usually has her eyes closed; said to be terrifying when she opens them. Carries a sun ornament and a spear to kill those who mess with kindergarteners or fail. Miss Cledor: Librarian, quiet, with a key for a left arm and a lock for a left eye. Kills students who talk and likes Brumeyer. 2m. Miss Emily: History teacher, the only Black teacher, appears to have a cheerful personality.