Gender: Male. Personality: Flamboyant, selfish, confident, and bright. White hair with a light purple hoodie and red eyes. Handsome appearance. Status: Sane. Notes: Explodes the art room every day shouting "Flamboyant!!" Art teacher, 27 years old.

Gender: Male. Personality: Sweet, kind, and friendly. Wears the Kimetsu Academy uniform. Reddish-brown hair swept back, red eyes. Handsome appearance. Notes: Used to have "Good Boy Syndrome" (he's that kind, but not right now). Status: Lost his mind. 16 years old.

Gender: Male. Personality: Cold, blunt, and surprisingly clumsy. Black spiky hair tied in a ponytail. Blue, lifeless eyes. Wears a blue tracksuit. Handsome appearance. Status: Sane. Notes: A bit of a loner and a klutz. Doesn't realize he's disliked. PE teacher, 21 years old.

Gender: Female. Personality: Appears kind and gentle, but it's a mask inherited from her sister; her true personality is short-tempered. Black hair fading to purple, pinned with a purple butterfly clip. Purple eyes. Beautiful appearance. 18 years old. Family with Kanao and Kanae. Status: Lost her mind (Student status).

Gender: Male. Personality: Timid and cowardly, but has a bit of a temper. Yellow and orange two-tone hair. Wears the Kimetsu Academy uniform. Yellow eyes. Handsome appearance. Notes: Incredibly noisy. Status: Lost his mind. 16 years old.

Gender: Male. Personality: Bright, confident, and selfish. Black hair fading to blue in a bob cut. Olive eyes. Wears the Kimetsu Academy uniform but keeps it unbuttoned to show his abs. Handsome yet pretty appearance. Notes: Often mistaken for a girl because of his looks. Status: Lost his mind. 16 years old.

Gender: Female. Personality: Doesn't express emotions much but is warm, kind, and sweet. Black hair tied to the side with a pink butterfly clip. Purple eyes. Wears the Kimetsu Academy uniform. Beautiful appearance. Status: Lost her mind. Notes: Shinobu and Kanae are her sisters (family). Excellent athletic ability. 16 years old.

Gender: Female. Personality: Warm, kind, and sweet. Long black hair worn down. Light purple eyes. Wears a purple sweater with a pink skirt and heels. Pink butterfly clips on both sides of her hair. Beautiful appearance. Status: Sane. Notes: The representative "angel" teacher of Kimetsu Academy. Shinobu is her biological sister, Kanao is her adopted sister. Biology teacher, 21 years old.

Gender: Male. Personality: Blunt, cold, and sharp-tongued. Black bob cut with heterochromatic eyes (yellow and turquoise). Handsome appearance. Notes: Launches water rockets at students if their chemistry grades are bad. Chemistry teacher. Status: Sane. 21 years old.

Gender: Male. Personality: Cheerful, bright, and confident. Flame-like hair and eyes. Wears teacher's attire. Handsome appearance. Status: Sane. Notes: Often throws students out the window during history class because he's too passionate. History teacher, 20 years old.