High-ranking politician, Dragonkin, Benedict's father, 600cm His left eye is a flame, he has ash-colored skin, and he wears a suit. He is characterized by red eyes and black dragon scales covering his arms. He is incredibly powerful but has a gentle personality. Since Hansel gouged out his son's eye, he gouged out Hansel's in return. He is looking for his son, Benedict Ignis.

Chemistry teacher, 253cm He wears a black gas mask and has long black hair. He is quiet, polite, and serves as Miss Bloomie's assistant. He is a Dragonkin, but he lost his left eye and most of his power. His real name is Benedict. He doesn't particularly kill students. He uses a pseudonym and avoids his father, perhaps due to his loss of power and his somewhat embarrassing past as a delinquent. (He still seems capable of breathing fire from his hands, though.)

Mr. Foxtrot: His left eye is an X; when 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 failing students. Mr. Hotchkiss: Craft teacher. His left eye is a letter and his left arm is a stapler. He is Mr. Barrel's husband and kills failing students. Long black hair. 3m. Mr. Brumeyer: Janitor. He hates his job and kills students who litter. His left arm is a vacuum cleaner. He likes Cledor and is short-tempered. 3m. Mr. Tron: A cute robot whose core is a blue slime. Engineering teacher. Mr. Demi: He has a crush on Miss Sasha. He is a timid music teacher. 180cm. Mr. Sciss: Anatomy teacher. He carries large scissors, is obsessed with Barrel, and is a bit of a madman. 2m. Mr. Vane: Has a red halo and a pair of wings, looking 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 seemingly kind personality. He doesn't appear to kill students. His left arm is a golf club. Mr. Eclipse: Wears an Anubis-like headpiece. Disco dance teacher. His heart was once pulled out by Sciss. He has a bad relationship with Hinata and is cheerful. (?)

Miss Elbara: School nurse with red eyes and a calm personality. She has the skill to revive even dead students. 170cm. Miss Ashachoo: School cafe owner. Kind and energetic. She can make 12 types of drinks, including Americano. 170cm. Miss Thavel: Language teacher with creature-like hands. She has three alphabet blocks on her head and deer antlers. Playful. She rips failing students to death. 251cm. Miss Bogurse: Electric eel 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 both an art teacher and a kindergarten teacher. A kind teacher who doesn't kill students. 169cm. Miss Hinata: Religion teacher and kindergarten teacher. At 4m, she is the tallest among the female teachers. 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, using them to stab kindergarteners who are messed with or students who fail. Miss Cledor: Librarian. Quiet. Her left arm is a key and her left eye is a lock. She kills students who talk and likes Brumeyer. 2m. Miss Emily: History teacher. The only Black teacher. Appears to have a cheerful personality.

Bat kin, security guard, 518cm He uses polite speech 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, allowing him to display emotions through emoticons. He is on the students' side and likes s'mores. However, he becomes monstrously cruel toward intruders.

298cm, left arm fused with a compass, Math teacher She loves Oreos and pressures failing students before killing them with her compass. She has a playful side and is in a relationship with Compass.

Twins, safety officers, 281cm Redhalt: Has red sclera and long black hair. Realistic and blunt. Wears a white cap and has white skin. Greenmile: Has green sclera and long black hair. Energetic and playful. Wears a black cap and has black skin. Both of them have hair that blazes like fire when angry and they move around on roller skates. Their left arms can transform into gun barrels. They hate bad students.

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