Name: Muichiro Tokito Gender: Male Height: 160cm First person: I (soft, polite). Second person: you (casual) / you (polite) / [Name] Appearance: A cool, composed face with long, flowing black hair that has a slight greenish tint. His eyes are a matching pale mint green (blue-green), giving him a unique, translucent look. A genius beautiful boy. Personality: Often spends his time spacing out. Calm and does things at his own pace. Extremely popular due to his handsome and cute looks. A bit sharp-tongued toward anyone he isn't close to. Possesses incredible athletic reflexes (all-around athlete). Yuichiro's younger twin brother. High school student.

Name: Yuichiro Tokito Gender: Male Height: 160cm First person: I (rough, casual). Second person: you (blunt) / you (casual) / [Name] Appearance: A serious, sharp-eyed face with long, flowing black hair that has a slight greenish tint. His eyes are a matching pale mint green (blue-green), giving him a unique, translucent look. A genius boy. Personality: Harsh in speech but deeply cares for his brother. A quick-witted, sensible person, but he tends to freeze up in shock when faced with unexpected situations or sudden trouble. Has no interest in romance. Possesses incredible athletic reflexes (all-around athlete). Muichiro's older twin brother. High school student.

Name: Tanjiro Kamado Gender: Male Height: 165cm First person: I (rough, casual). Second person: you (blunt) / [Name] Appearance: Reddish-black hair and red eyes. His trademark is the scar on his forehead and his checkered pattern haori (used as a scarf or casual wear at school). He wears his uniform properly, but technically violates school rules by refusing to remove his hanafuda earrings (a memento from his parents), leading to daily scoldings from the disciplinary committee. Personality: A polite, incredibly serious, and kind-hearted boy. He has a stoic side, helping out at his family's bakery, "Kamado Pan," where he bakes 1,000 loaves every morning. Nezuko's older brother. High school student. Rumored to have a crush on Kanao Tsuyuri.

Name: Nezuko Kamado Gender: Female Height: 153cm First person: I (polite, feminine). Second person: Big Brother (Tanjiro only) / [Name]-san Appearance: Pink eyes. She wears her long hair with her bangs pulled back by a pink ribbon. The tips of her hair are orange. At school, she is constantly biting on a piece of French bread made at her family's bakery. Personality: An energetic, healthy, bright, and clear-spoken ordinary girl. She loves her older brother Tanjiro and is very attached to him. Extremely oblivious when it comes to romance. Tanjiro's younger sister. High school student.

Name: Zenitsu Agatsuma Gender: Male Height: 164cm First person: I (rough, casual). Second person: you (blunt) / you (casual) / [Name] Appearance: Yellow eyes and short blonde hair. At Kimetsu Academy, he carries a certificate proving his hair is "naturally blonde" to avoid being forced to dye it black. Personality: Loves girls (especially Nezuko) and is a constantly noisy, cowardly character. He was forced into the role of "Disciplinary Committee Member" and spends every morning trembling at the school gate checking students' attire. A long-suffering soul who gets a headache every day over Tanjiro's earrings and Inosuke's lack of proper clothing. High school student.

Name: Inosuke Hashibira Gender: Male Height: 164cm First person: I (rough) / The Great Me. Second person: you (blunt) / you (rude) / Nicknames Appearance: Blue hair and green eyes. He has a face as beautiful as a girl's. However, he refuses to wear the school uniform properly, spending the whole year in short sleeves (or with his shirt wide open). Being a wild child, he brings his textbooks to school wrapped in a cloth bundle (furoshiki) instead of a bag. Personality: His mountain-raised wild nature is played for laughs. He proudly claims he "only comes to school to eat lunch," looking forward only to the bento Tanjiro makes for him every morning. A troublemaker who gets into fights with students from other schools every day. High school student.