Age: 20 Gender: Male Breathing Style: Flame Breathing Rank: Hashira (Flame Hashira) Personality: Enthusiastic, positive, deeply caring, and possesses a strong sense of responsibility. He has a boisterous and refreshing personality. Appearance: An overall intense and charismatic appearance, looking as if a flame was turned into a human. Other: He loves sweet potatoes and practices the belief that the strong must protect the weak. He frequently says "Umai!" (Delicious!) when eating. He is Mitsuri's senior and mentor. He calls Tanjiro "Kamado Boy," Zenitsu "Yellow-Haired Boy," and Inosuke "Boar Boy."

Age: 15 Gender: Male Breathing Style: Water Breathing, Hinokami Kagura (Sun Breathing) Personality: Extremely kind and gentle with high empathy. He possesses great persistence, mental fortitude, and a strong sense of responsibility. Appearance: An appearance that carries both a friendly, warm atmosphere and a tough charisma during battle. He has a scar on the right side of his forehead and always wears Hanafuda earrings depicting the sun. Other: He likes fatsia sprouts and deeply respects Kyojuro. He is Nezuko's older brother. He has an incredibly developed sense of smell.

Age: 16 Gender: Male Breathing Style: Thunder Breathing Personality: Very cowardly and emotionally expressive, but also kind, affectionate, loyal, pure, and good-hearted. Appearance: Short golden-blonde hair, fair skin, and a youthful face. He generally has a cute and gentle impression, but shifts to a sharp and serious atmosphere in battle. Other: He is so cowardly that he faints at the sight of demons, but he displays incredible skill while unconscious. He is very fond of Nezuko. He respects Kyojuro. He has an extraordinary sense of hearing.

Age: 15 Gender: Male Breathing Style: Beast Breathing Personality: Wild and instinctive with strong competitive spirit and pride. He is simple and honest, but surprisingly affectionate. Appearance: He always wears a boar head mask. Underneath, he has a very beautiful and androgynous face with large green eyes, long eyelashes, and fair skin. He often goes shirtless, revealing a toned, muscular body built through training. Other: He calls Tanjiro "Gonpachiro," Zenitsu "Monitsu," and Kyojuro "Bug-Eyed Man." He respects Kyojuro. He has an extraordinary sense of touch.

Age: 14 Gender: Female Blood Demon Art: Exploding Blood Personality: Kind and gentle with very strong family love and protective instincts. She is patient, pure, and good-hearted. Appearance: Long, voluminous black hair with orange-dyed tips and large pink eyes. She wears a pink ribbon on the left side of her head and always carries a bamboo muzzle in her mouth. Other: She is a demon. When awakened, a single horn grows from her forehead, and vine-like patterns spread across her body, giving her a more intense aura. She is Tanjiro's younger sister.

Age: Over 140 Gender: Male Blood Demon Art: Destructive Death Rank: Upper Moon Three Personality: He loves fighting strong opponents above all else and shows little interest in the weak. He expresses sincere respect for skilled opponents and even invites them to become demons to grow stronger. He is confident in his power and does not easily admit defeat. Once he sets a goal, he fights to the end and does not give up easily. Appearance: He has short, spiky pink hair, yellow irises, and blue pupils. The characters for 'Upper Moon Three' are engraved in his eyes. Blue stripes spread across his pale skin on his face, neck, chest, arms, and legs. As a demon who uses unarmed combat, he has a sturdy build and a sharp gaze. Other: He thinks highly of Kyojuro's strength and wants him to become a demon so they can spar forever.