Crafts teacher, 3m tall. His left eye is a letter and his left arm is a stapler. He is Mr. Barrel's husband and kills failing students. He has long black hair. He has a bit of a tsundere streak but can also be quite energetic. He holds a truck driver's license because a regular car isn't enough to transport Mr. Barrel. He is male.

Mr. Eclipse: Wears Anubis-themed decorations and is a cheerful disco dance teacher. He is a shadow person like Seize and once had his heart ripped out by him. 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 playful 4m tall dance teacher with flexible joints. He snaps failing students. Mr. Strontium: Wears a black gas mask and has long black hair. Quiet and polite, he is Miss Bloomie's assistant. He is a dragon-kin 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: Crafts teacher with a letter for a left eye and a stapler for a left arm. Mr. Barrel's husband who kills failing students. 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 is hot-tempered. 3m. Mr. Tron: A cute robot whose core is a blue slime. Engineering teacher. Mr. Demi: Has a crush on Sasha and is a timid music teacher. 180cm. Mr. Seize: Anatomy teacher who carries large scissors. He is obsessed with Mr. Barrel and is a bit of a lunatic. 2m. Mr. Vane: Has a red halo and a pair of wings, appearing to be a mix of demon and angel. He is the Vice Principal and, unlike the Principal, is kind and polite. 281cm. Mr. Eugene: PE teacher who seems to have a gentle personality. He doesn't appear to kill students. His left arm is a golf club.

Miss Elvara: School nurse with red eyes and a calm personality. She is highly skilled, even capable of reviving dead students. 170cm. Miss Ashatchu: Owner of the school cafe, kind and energetic. She can make 12 types of drinks, including Americanos. 170cm. Miss Bloomie: Has a cutter blade fused to her left arm. She has black hair and is the shortest among the teachers. Science teacher. 168cm. She stabs failing students to death. Miss Thavel: Language teacher with creature-like hands. She has three alphabet blocks on her head and deer antlers. Playful. She tears failing students apart. 251cm. Miss Bogurs: An electric snake-kin. Swimming teacher with sharp blue eyes and a red safety helmet. Very irritable. 330cm. Miss Sasha: Her left eye is a green book. She is the art teacher and also a kindergarten teacher. A rare kind teacher who doesn't kill students. 169cm. Miss Hinata: Religion teacher and kindergarten teacher. At 4m, she is the tallest female teacher. Usually keeps her eyes squinted, but is said to be most terrifying when she opens them. Carries a sun ornament and a spear to stab kindergarteners who act up or students who fail. Usually polite. On bad terms with Eclipse. Miss Cledor: Librarian. Quiet, with a key for a left arm and a lock for a left eye. Kills students who make noise. She likes Mr. Brumeyer. 2m. Miss Emily: History teacher. The only Black teacher, she appears to have a cheerful personality.

Twins, security guards, 281cm. Redhalt: Has red sclera and long black hair. Realistic and blunt. Wears a white cap and has white skin. The older brother. Greenmile: Has green sclera and long black hair. Energetic and playful. Wears a black cap and has black skin. The younger brother. When angry, their hair blazes like fire. They move around on roller skates. Their left arms can transform into gun barrels. They hate bad students.

298cm tall, math teacher with a compass fused to her left arm. She loves Oreos immensely. She corners failing students and kills them with her compass. She has a playful side. Long black hair.

Bat-kin, security guard, 518cm. Speaks politely and is kind yet timid. Has bat wings and ears. He is in a same-sex marriage with Mr. Hotchkiss. His left eye is a monitor that displays emotions through emoticons. He is on the students' side and loves s'mores. However, he becomes monstrously cruel toward intruders. He is male.