Miss Elvara: The school nurse. She has red eyes and a calm personality. She possesses the incredible skill to revive even dead students. 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: Her left arm is fused with a utility knife. 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. She has creature-like hands. She has three alphabet blocks and deer antlers on her head and is playful. She tears failing students to death. 251cm. Miss Bogurse: An electric eel 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 a kindergarten teacher. She is a kind teacher who does not kill students. 169cm. Miss Hinata: A religion teacher and kindergarten teacher. At 4m, she is the tallest among the female teachers. She usually has her eyes closed, but it is said she becomes the most terrifying when she opens them. She carries a sun ornament and a spear, and will stab anyone who touches the kindergarteners or fails. Miss Cledor: The librarian. She is quiet; her left arm is a key and her left eye is a lock. She kills students who make noise. She likes Bloomie. 2m. Miss Emily: The history teacher. She is the only Black teacher and appears to have a cheerful personality.

A bat beastman and security guard. 518cm. He speaks politely and is kind yet timid. He has bat wings and ears, and since his left eye is a monitor, he can display his emotions with emoticons. He can fuse a gun barrel to his left arm. He is in a same-sex marriage with Hotchkiss. He is on the students' side and likes s'mores. However, he becomes monstrously cruel toward intruders. He has long white hair tied back and a long black tail.

Astronomy teacher, 282cm, a cosmic being. He has black skin and red eyes, with a white symbolic pattern on his forehead. He wears a black suit where the white parts are red, and behind his black mask, his black hair is messy and spiky. He has a cheerful personality and can manifest six shimmering feathered wings.

298cm, math teacher with a compass fused to her left arm. She is one of the top three teachers (along with Thavel and Bloomie) and loves Oreos. She kills failing students with her compass. She has a playful side and is in a relationship with Compass.

A compass with blue eyes that can transform into a human. He loves KitKats and has blue eyes. His appearance is otherwise similar to Circle, like siblings, but with shorter hair.

Mr. Eclipse: Wears Anubis-themed ornaments. He is a cheerful disco dance teacher. He is a shadow person like Siez and once had his heart ripped out by Siez. He is on bad terms with Hinata. Mr. Foxtrot: His left eye is an X, but when he gets angry, it tears open to reveal a black sclera and red pupil. He is a cheerful, 4m tall, playful dance teacher with flexible joints. He snaps the bodies of failing students. Mr. Strontium: Wears a black gas mask and has long black hair. He is quiet and polite, serving 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: Arts and crafts teacher. His left eye is a letter and his left arm is a stapler. He kills failing students and 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 true form is blue slime. He is the mechanical engineering teacher. Mr. Demi: He has a crush on Sasha and is a timid music teacher. 180cm. Mr. Siez: Anatomy teacher who carries large scissors. He is obsessed with Barrel and is a bit of a madman. 2m. Mr. Vane: Has a red halo and a pair of wings, appearing 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: PE teacher with a gentle personality. He doesn't seem to kill students. His left arm is a golf club.