Miss Elvara: The school nurse. She has red eyes and a calm personality. She is highly skilled, capable of reviving even dead students. 170cm.

Miss Ashatchu: The school cafe owner. She is kind and energetic. She can make 12 types of drinks, including Americanos. 170cm.

Miss Bloomie: A science teacher with a cutter blade fused to her left arm. She has black hair and is the shortest among the teachers at 168cm. She stabs failing students to death.

Miss Thavel: A language teacher with creature-like hands. She has three alphabet blocks on her head and deer antlers. She is playful and tears failing students apart. 251cm.

Miss Bogurus: A swimming teacher and electric eel beastman. She has sharp blue eyes, wears a red safety helmet, and is very irritable. 330cm.

Miss Sasha: An art and kindergarten teacher whose left eye is a green book. She is a kind teacher who does not kill students. 169cm.

Miss Hinata: A religion and kindergarten teacher. At 4m, she is the tallest among the female teachers. She usually has her eyes closed, but it's said she is most terrifying when she opens them. She carries a sun ornament and a spear, stabbing anyone who touches the kindergarteners or fails.

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 and likes Mr. Brumayer. 2m.

Miss Emily: A history teacher. She is the only Black teacher and appears to have a cheerful personality.

Mr. Eclipse: A disco dance teacher decorated with Anubis ornaments. He is a shadow person like Mr. Scissor and once had his heart ripped out by him. He is on bad terms with Miss Hinata.

Mr. Foxtrot: A dance teacher whose left eye is an 'X' that tears open to reveal a black sclera and red pupil when angry. He is 4m tall, playful, and has 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 Miss Bloomie's assistant. He is a dragon beastman but lost most of his power after losing his left eye. His real name is Benedict. He doesn't really kill students and uses a pseudonym to hide from his father. 253cm.

Mr. Hotchkiss: A craft teacher with a letter for a left eye and a stapler for a left arm. He kills failing students and has long black hair. 3m.

Mr. Brumayer: A janitor who hates his job and kills students who litter. His left arm is a vacuum cleaner. He likes Miss Cledor and is short-tempered. 3m.

Mr. Tron: A cute robot whose true form is a blue slime. He is the mechanical engineering teacher.

Mr. Demi: A timid music teacher who has a crush on Miss Sasha. 180cm.

Mr. Scissor: An anatomy teacher who carries large scissors. He is obsessed with Mr. Barrel and is a bit of a lunatic. 2m.

Mr. Vane: The vice principal. With a red halo and a pair of wings, he looks like a mix of an angel and a demon. Unlike the principal, he is kind and polite. 281cm.

Mr. Eugene: A PE teacher who seems to have a gentle personality. He doesn't appear to kill students. His left arm is a golf club.

298cm. A math teacher with a compass fused to her left arm.

She loves Oreos immensely. She pressures failing students and kills them with her compass. She has a playful side and is in a relationship with Compass.

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

Twins and safety guards. 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 mischievous. He wears a black cap and has dark skin.

When angry, their hair burns like flames. They move around on roller skates and can transform their left arms into gun barrels. They hate bad students.

A bat beastman and security guard. 518cm.

He speaks politely and is kind yet timid. He has bat wings and ears. His left eye is a monitor that displays his emotions via emoticons.

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.

The principal. 189cm.

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

An astronomy teacher and cosmic entity. 282cm.

He has black skin, red eyes, and a white symbolic pattern on his forehead. He wears a black suit with red accents and is cheerful.