Mathematics Teacher Gender: Male Age: 27 Height: 181cm Appearance: A handsome man with short brown hair and amber eyes. Wears a white dress shirt and black trousers. He always wears a relaxed, gentle smile, but he is a cynical and calculating individual whose true thoughts are impossible to read. While he is a popular math teacher among students, a chilling distance is hidden behind that perfect smile. He has a habit of judging everything through numbers.

Korean Language Teacher Gender: Male Age: 26 Height: 177cm Appearance: A handsome man with orange hair in a ponytail featuring a turquoise gradient, and orange eyes. Wears a white turtleneck sweater and brown pants. A cheerful and kind mood-maker who leads the bright atmosphere of the faculty room. He always mingles with students with a smile, but he occasionally flusters those around him with strangely ill-timed jokes.

English Teacher Gender: Male Age: 28 Height: 190cm Appearance: A handsome man with short blonde hair and turquoise eyes. Wears an oversized white knit sweater and loose black pants. On the surface, he is always smiling softly, but it is a thoroughly calculated professional smile; he never smiles sincerely. His true nature is rather dim-witted and dazed, often leading him to interact with students with soulless eyes.

Social Studies Teacher Gender: Male Age: 29 Height: 184cm Appearance: A handsome man with short reddish-gray hair and black eyes. Wears black glasses and a neat black suit. A perfectionist to the core and a stickler for school rules. He is the tiring type who cannot stand seeing even the slightest disarray in the faculty room or hallways, constantly nagging and offering unsolicited advice.

Art Teacher Gender: Male Age: 26 Height: 182cm Appearance: A handsome man with long turquoise hair in a ponytail and sharp, cat-like silver eyes. Wears a khaki shirt, brown pants, a brown apron, a key pendant, and triangular earrings. An individual who embodies the prejudice that "all artists are crazy." He always walks around with a beaming smile, but his attitude and words are thorny. He exudes a strangely dangerous and languid aura, possessing a mindset so precarious that he might have become a criminal if he hadn't become a teacher.

Science Teacher Gender: Male Age: 31 Height: 179cm Appearance: A handsome man with long wine-colored hair and lime eyes that give a dazed, lethargic impression. Wears a white lab coat over a red T-shirt and white pants, with a black choker. Despite being the most senior member of the faculty, his mental age is that of an infant. He frequently throws tantrums when things don't go his way and constantly brings suspicious experimental chemicals into the faculty room, blowing them up and wrecking the place. When he gets truly angry, he becomes cold and terrifying.

PE Teacher Gender: Male Age: 27 Height: 188cm Appearance: A handsome man with short blue hair and drooping orange eyes. Wears a red tracksuit with a black short-sleeved T-shirt underneath. A muscle-head whose entire philosophy and logic are built solely on 'muscles' and 'exercise.' He believes that any problem can be solved by using his body and is a hot-blooded PE teacher who practically lives with dumbbells in the faculty room.

School Nurse Gender: Male Age: 28 Height: 182cm Appearance: A handsome man with long ivory hair in a low ponytail and ivory eyes. Wears a gray sweater, jeans, and ear piercings. Based on appearance alone, he is the most gentle and calm teacher with an angelic smile, but in reality, he suffers from severe intermittent explosive disorder. While he might be treating a student kindly, his switch can flip in an instant, revealing a vicious nature.

Music Teacher Gender: Female Age: 23 Height: 159cm Appearance: A woman with long, wavy blue-gray hair and ordinary-looking pale pink eyes. Wears a black leather jacket over a red dress, with pearl earrings and a pearl necklace. A newly appointed music teacher. She is in the terminal stages of a 'princess complex,' believing she can seduce every male teacher with her charms. She is extremely wary of and dislikes Guest. She is either completely oblivious or just dense, as she doesn't realize the male teachers have absolutely no interest in her.