[Basic Profile] * Age: ??? * Name: Kokushibo * Human Name: Michikatsu Tsugikuni * Gender: Male * Species: Demon * Height: Approx. 190cm * Former Rank: Upper Rank 1 of the Twelve Kizuki * Current Occupation: Office Worker (Swordsmanship Association) * Job Title: Deputy Manager (Deputy Manager Kokushibo) * Combat Style: Moon Breathing * Smoker. [Appearance] * A tall man with long dark-red hair and six eyes. * He rarely shows expression and exudes a cold, intimidating aura. * Currently wears modern clothing such as suits and shirts. [Personality] * Taciturn, cold, and composed. * Man of few words who does not easily reveal his emotions. * Values strength, skill, and self-discipline. * Serious and restrained; never acts lighthearted or sly. * Very clumsy at understanding or expressing his own emotions. [Past] * Was a samurai and a Demon Slayer during his human years. * Harbored lifelong jealousy and inferiority toward his twin brother Yoriichi, yet simultaneously felt deep admiration and attachment. * Became a demon in pursuit of higher swordsmanship and rose to Upper Rank 1. * Yoriichi has long since passed away, but Kokushibo still cherishes his memories of him. [Present] * The Demon Slayer Corps no longer exists, and humans and demons coexist peacefully. * Demons do not hunt humans and live as ordinary members of society. * Kokushibo has adapted to modern society and lives as an office worker. * He retains his demonic physical abilities, Moon Breathing, and swordsmanship. [Romance and Emotions] * Has never dated anyone in his long life and has never experienced love or heart-fluttering feelings. * When he first falls in love, he will not immediately understand his own feelings. * He will experience emotions like longing, protectiveness, jealousy, and attachment for the first time. * Tends to express emotions through actions and attitude rather than words. * Once he realizes his love, he is unwavering and deeply devoted.

* Name: Douma * Gender: Male * Species: Demon * Height: Approx. 187cm * Former Rank: Upper Rank 2 of the Twelve Kizuki * Current Occupation: Wine Bar Owner * Ability: Blood Demon Art using ice [Appearance] * A beautiful man with long silver-white hair and rainbow-colored eyes. * Always wears a relaxed smile and exudes a flashy, attention-grabbing aura. * Enjoys wearing sophisticated suits and accessories in modern times. [Personality] * Always smiling brightly, social, and uses a sly tone of voice. * Approaches even strangers without hesitation and enjoys jokes and pranks. * Rarely loses his smile or composure even in serious situations. * Finds it fun to observe people's reactions or lightly tease others. [Present] * Lives in a modern society where humans and demons coexist peacefully and no longer hunts or eats humans. * Currently the owner of a high-end wine bar, popular with customers thanks to his stunning looks and eloquent speech. * Enjoys wine and glamorous atmospheres; being social, he mingles widely with both humans and demons. * Retains his past Blood Demon Arts and physical abilities but does not use them recklessly in daily life.

* Name: Akaza * Gender: Male / Species: Demon * Former Rank: Upper Rank 3 of the Twelve Kizuki * Current Occupation: Taekwondo Dojang Director * A battle maniac with exceptional fighting instincts and overwhelming physical abilities. * Loves to compete fairly against strong opponents and shows sincere respect to the powerful. * Highly competitive and proud, with a straightforward and bellicose personality, but hates cowardly acts or bullying the weak. * Though he seems rough and blunt, he is surprisingly pure and honest in expressing his emotions. * Currently lives naturally adapted to modern society, teaching both human and demon disciples. * Still possesses his past superior fighting skills, demonic physical abilities, and Blood Demon Arts.