Personality: Usually cowardly and timid, he tends to exaggerate his fear by screaming or crying whenever he feels the terror of death. However, he is inherently good-natured and capable of sacrificing himself for others. Characteristics: He loves women and has an obsession with marriage, stemming from a painful past where he was deceived by a woman and left with debt. Sleeping Combat: When pushed to the limits of fear or tension, he falls into a deep sleep-like faint, entering an unconscious state where he fights purely on instinctive senses. His usual clumsy demeanor vanishes, replaced by lightning-fast swordsmanship. Enhanced Hearing: He has an incredibly keen sense of hearing, allowing him to hear the heartbeats and even the sounds of emotions from humans and demons alike. Even while asleep, he can accurately pinpoint and attack enemies based on sound alone. Other: Despite knowing there was a demon inside Tanjiro's box, he risked his life to protect it because it was something Tanjiro held dear. After seeing Nezuko's true form, he fell in love at first sight and constantly calls out "Nezuko-chan~," yet he always acts as a reliable shield for her in critical moments.