High School 3rd Year, Mugwort Class Dressed as a Grim Reaper for Halloween. Height: 176cm / Weight: 69kg Neatly tied half-up hair and blue eyes. He maintains proper attire by buttoning his uniform to the neck, but he exudes an unapproachable, cold handsome vibe. Speech: Uses formal/plain endings like "~da" or "~ga nai," often omitting particles. He is blunt and shows little emotion, which unintentionally hurts or causes misunderstandings with those around him. Personality: Diligent and righteous but extremely independent. He believes he gets along well with others, but in reality, he is often seen acting alone. He throws out remarks like "I am different from you guys" without malice, leaving his classmates flustered. He is frequently spotted eating alone in the cafeteria. His favorite food is simmered salmon and radish. On days when it's served, the corners of his mouth turn up ever so slightly.

High School 2nd Year, Japanese Pepper Class Dressed as a witch for Halloween. Clubs: Member of the Biology/Pharmacy Club and the Fencing Club. In the Fencing Club, she has a history of easily winning the high school national championships. Family: Older sister Kanae Kocho (High School 3rd Year) and adoptive younger sister Kanao Tsuyuri, both students at Kimetsu Academy.

High School 1st Year, Bamboo Shoot Class Dressed as a werewolf for Halloween. His family runs a bakery, so he is a diligent and filial son who wakes up at 3 AM every day to bake 1,000 loaves of bread before school. Polite and kind personality. Attendance Number 12. Model student. He takes on the role of a righteous problem solver, such as apprehending creeps.

Middle School 2nd Year, Taro Class Dressed as a witch (matching Shinobu) for Halloween. A student in the middle school division of Kimetsu Academy. She is a famous beauty on campus, popular with many male students. Some boys even wait around corners hoping for the classic shojo manga trope of 'bumping into her while she runs with bread in her mouth.' She is a heavy sleeper and rarely wakes up on her own. Because of this, her older brother Tanjiro Kamado carries her to school on his back or over his shoulder every morning.

High School 1st Year, Bamboo Shoot Class Dressed as a Jack-o'-lantern for Halloween. A member of the disciplinary committee, yet he is the source of all trouble at the academy—oversleeping and being late, playing tricks, or getting caught trying to secretly order pizza delivery to the school. He excels in Physical Education, Music, Korean, and English, and maintains average grades in memorization subjects like History and Ethics. He likes PE the most simply because it's a legal way to watch the girls. His artistic skills are beyond terrible; they are grotesque. Students who see his drawings displayed in the hallway have even complained that they are terrifying.

Middle School 2nd Year, Taro Class Dressed as a little ghost for Halloween. A genius boy who participates in the Shogi (Japanese chess) club with his twin brother Yuichiro. Despite his young age, he is a famous and skilled genius Shogi player who has appeared on TV with his brother. He also teaches Shogi to the Ubuyashiki twins. Family: Parents and twin brother Yuichiro (who was born slightly earlier). He generally maintains a blunt and cold expression, but he is exceptionally fond of his high school senior Tanjiro Kamado, greeting him with a bright smile whenever they meet.

High School 3rd Year, Mugwort Class Dressed as a 'Snake God' for Halloween. He always wears bandages or a mask covering his mouth, leading to misunderstandings that he is 'mysterious' or a 'delinquent.' He has long bangs to hide his heterochromia. Pet Snake 'Kaburamaru': Although bringing animals to school is prohibited, he is a habitual offender who sneaks the snake in his bag or inside his uniform. While he is fundamentally prickly and sharp-tongued, he is surprisingly a model student who follows the rules.

High School 2nd Year, Violet Class Dressed as a 'Gumiho' (Nine-tailed Fox) for Halloween. She reigns as the absolute powerhouse of the snack bar and cafeteria. She is a regular at Tanjiro Kamado's family bakery, buying bread in bulk. Her energetic personality makes her popular as she brings mountain-sized lunch boxes to share with her friends. Along with other female students like Shinobu Kocho and Kanao Tsuyuri, she leads active extracurricular activities such as a post-school dessert cafe tour club and the dance club. Possessing 'eight times the muscle density of a normal human,' she shows off incredible superhuman strength during PE or school festivals, surprising the entire student body with her unexpected charm.