Gender: Female Age: 31 Height: 168cm Subject: Korean Appearance: Bright blue hair with gold eyes, wearing round glasses. Clothing: A red shirt with a yellow knit sweater over it, paired with jeans. Personality: Kind, deeply considerate, but turns cold when angry. She is the most emotional among them. MBTI: ENFP

Traits: Always carries a Korean textbook and the Hunminjeongeum. She wears glasses due to poor eyesight, but is beautiful when she takes them off. For some reason, she is often seen with Mr. Harang.

Gender: Male Age: 31 Height: 180cm Subject: Math Appearance: Dark red hair with a bluish-purple tint swept to both sides, blue eyes. Clothing: A red cardigan over a black T-shirt, paired with black shorts. Personality: Blunt and perpetually exhausted. He maintains a poker face to avoid emotional drain. MBTI: INTJ

Traits: Sleeps the most out of everyone but says he's tired every day. He has been friends with Mr. Kiden for 20 years (considers him an alarm clock that wakes him up every day). He finds it bothersome that Ms. Eri follows him around constantly.

Gender: Male Age: 31 Height: 176cm Subject: Chemistry Appearance: Black hair with goggles on top, black eyes with the left eye covered by an eyepatch (blinded). Clothing: A lab coat over a black shirt, paired with denim shorts. Personality: Irritable and prone to swearing. He is cold-blooded regarding his work, but surprisingly clumsy at times. MBTI: ISTJ Sibling: Mr. Ki-il (younger brother)

Traits: Spends most of his day holed up in his room; if you hear a thud, it's him experimenting. He thinks of Mr. Harang as 'the guy who does nothing but sleep' (no hard feelings).

Gender: Female Age: 34 Height: 165cm Subject: Music Appearance: Dark orange hair with green highlights on the sides, pale blue eyes. Clothing: A blue-gray jumper over a white T-shirt, paired with dark khaki pants. Personality: The mood maker. She is bright and friendly even with strangers, but while she smiles during work, she turns cold if a mistake is made. MBTI: ESFP

Traits: Carries a 90cm folding ruler made by Mr. Harang every day. Her voice is higher than a soprano's, yet she ironically craves quiet places.

Gender: Male Age: 29 Height: 172cm Subject: Science Appearance: Bleached blonde hair with dark blue eyes. He covers his mouth with a mask and wears a necklace (pattern unknown). Clothing: Same style as Mr. Kiden. Personality: Unlike his brother, he is cautious, meticulous, and quite timid. MBTI: ISFP Sibling: Mr. Kiden (older brother)

Traits: Has a love-hate relationship with his brother, but since his brother nags when he complains, he just lives with his mouth shut. Often hangs out with Ms. Choi.

Gender: Female Age: 28 Height: 157cm Subject: Social Studies Appearance: Blue layered wolf cut with long side bangs. Her left eye is magenta-purple (right eye is kept closed, but is red when opened). Clothing: A gray cardigan over a school uniform, paired with black uniform pants. Personality: Easygoing and lethargic, but the atmosphere turns heavy when she gets serious. MBTI: INFJ

Traits: The shortest among the teachers. She is relaxed and loves plants. She keeps her right eye closed daily because she doesn't want to show it for a certain reason. Almost always with Mr. Ki-il. There is a plant on top of her head, but it doesn't affect her daily life.

Gender: Male Age: 30 Height: 192cm Subject: PE Appearance: Black hair in a short cut swept to one side, black eyes. Clothing: Full tracksuit (white T-shirt underneath). Personality: Energetic and jovial. A mood maker like Ms. Miru. MBTI: ENTP

Traits: The tallest and arguably the most 'sane' teacher, though he refuses to miss a workout even in a downpour and will go running in heavy rain.

Gender: Male Age: 32 Height: 183cm Subject: English Appearance: Dark layered purple hair with green eyes. He has a third eye on his cheek and wears horn-rimmed glasses. Clothing: A dark purple hoodie with a black shark logo in the center, paired with black training shorts. Personality: Quiet and the ultimate 'fact-bomber' (his biting remarks are severe). MBTI: INTP

Traits: Possesses the highest combat ability among the teachers. His nagging based on cold facts is enough to make one's ears bleed. For some reason, he is speechless in front of Ms. Leshion.

Gender: Female Age: 36 Height: 172cm Subject: Home Economics Appearance: Red hair with a magenta tint and blue eyes (pupils turn vertical when angry). She wears a monocle over her left eye, but it's not visible. Clothing: Similar to Ms. Choi but wears a tie and a gray jacket with black pants. Personality: Hot-tempered and prone to intermittent explosive disorder, but values the other teachers above all else. MBTI: ENTJ

Traits: Has a mechanical left arm due to an accident but uses it with satisfaction. Despite her temper, she has never been truly, fully enraged. She notices Mr. Chic is often around her and finds it annoying, but doesn't say much.