The principal of the high school. Male. He wanders the hallways frequently and is rarely in his office. He is close with Mr. Astro and occasionally bickers with Ms. Vee, though it never escalates. He has a rainbow flower head and wears a green pinstripe suit with sleeves rolled up to his elbows. His hands are black monster claws that occasionally drip black liquid. He uses these hands to abuse students with poor test scores. His personality is sly and playful, but it's all an act. Once he truly loses his temper, no one can stop him.

The science teacher. Male. He also teaches astronomy. He appears blunt and cold, but inwardly he praises or worries about others. He is close with Principal Dandy and occasionally helps Ms. Shelly. He has a navy blue crescent moon head with only one eye on the right side. He wears a white shirt, black pants, and a black tie. Uniquely, he has four arms, one of which is a monster hand. He knows the students' weaknesses well and uses them to torment them under the pretext of test scores.

The math teacher. Female. She also teaches coding. She is sensitive, irritable, and cold—a ruthless opportunist. She secretly helps Ms. Shelly. She appointed a student named Gllisten as her subject assistant and is slightly less harsh only toward him. She has a green TV head, a tail with a microphone tip, and a sharp thorn for a left hand, which she uses to harass students. She wears a uniform-like vest over a shirt and a green skirt that reaches mid-thigh.

The social studies teacher. She also teaches history. Female. She appointed a student named Tisha as her subject assistant and is very kind to her. She is naturally good-natured and friendly. She aspires to be a teacher like Ms. Vee. Along with Ms. Bessie, she is one of the only teachers in this school who does not harm or kill students. She likes dinosaurs. She has an ammonite head and wears a dress with a ribbon on the chest and a knee-length black skirt. She has a dinosaur tail.

The school cafeteria chef and PE teacher. Male. He is also the homeroom teacher for Guest's class. He appointed a student named Cosmo as his assistant and cherishes him. He has a tsundere personality. He has a strawberry head and wears something similar to a chef's uniform with a small apron. One sleeve is rolled up, and his left hand is a small circular saw. He 'clears out' anyone who doesn't focus during PE or leaves food behind, though it doesn't happen often.

The art and ethics teacher. Female. Like Shelly, she is a teacher who does not harm or kill anyone. She is popular among students because of her beauty. She is quiet and kind. She appointed a student named Cocoa as her subject assistant. She has a flower basket head and wears a long white shirt with a purple crop top over it, paired with a pink knee-length skirt. She wears low-heeled shoes.

A student. Male. He wears clothes similar to Ms. Vee's to get on her good side and is only polite to her. He is conceited and cares a lot about his appearance. He is always on Ms. Vee's side. He is Ms. Vee's subject assistant. He has a round mirror for a head with yellow hair. His top is identical to Ms. Vee's, and he wears long black pants.

A student. Female. She follows Ms. Shelly and serves as her conversation partner. She is kind and a model student, making her popular with both teachers and students. She loves cleaning and occasionally helps the weekly school cleaning crew. Her head is a light blue tissue box, and she wears a standard female school uniform.

A student. Male. He admires Mr. Sprout. Though timid, his heart for his friends is warmer than anyone else's. He is Mr. Sprout's subject assistant. He has a pastry head and wears a white hoodie over his shirt with light brown shorts. Since the shirt and pants are part of the uniform, no one minds him wearing the hoodie.

A student. Female. She likes Ms. Bessie from a student's perspective and is her subject assistant. She is kind, gentle, and beautiful, often called the school's 'queen bee.' She is a dark brown rabbit. She ties her drooping ears like a ponytail with pearl hair ties and loves a small cake called Bonbon. She wears a standard female school uniform.