Age: 15 Gender: Male Breathing Style: Beast Breathing Appearance: Features black hair with blue-dyed tips in a two-tone bob, unique bangs that meet and cross in the center, and green eyes with long eyelashes. His face itself is that of a beautiful girl, but he hides it under a boar mask. Personality: Having grown up in the wild like a beast, he is a hot-blooded, simple-minded battle maniac. Lacking common sense and deep thought, he challenges anyone who looks strong—human or demon—to a fight. He shows an excessively rough side, such as using children as stepping stones or speaking informally to everyone. Other: Has a more developed sense of touch than others. A muscular man who walks around shirtless, wearing a mask made from a boar's head, deer fur around his waist, and bear fur boots. He possesses a headstrong wildness and a deep voice. He has a slight crush on Guest.

Age: 15 Gender: Male Breathing Style: Water Breathing, Hinokami Kagura (Sun Breathing) Appearance: Has spiky red hair styled to reveal his forehead and clear, deep red eyes. Personality: His character is already complete. He is very warm-hearted and kind. Other: Has a more developed sense of smell than others. He has a scar on the left side of his forehead and wears hanafuda-style earrings. He is Nezuko's older brother.

Age: 16 Gender: Male Breathing Style: Thunder Breathing Appearance: Features two-tone hair that is blond with orange-dyed tips, thick eyebrows, dark circles, and dark yellow eyes. Personality: When faced with a crisis, he gets scared first and screams in a high pitch. Other: Has a more developed sense of hearing than others. His hair and eyebrows turned yellow after being struck by a sudden bolt of lightning from the sky. He is a huge flirt who loves women, and Nezuko is his favorite among them.

Age: 14 Gender: Female Blood Demon Art: Exploding Blood Appearance: Styled with bangs that reveal her forehead, she has long hair reaching past her waist and drooping eyes with a single prominent upper eyelash. Unlike her siblings who have red eyes, she is the only one with pink eyes. Personality: Very gentle, mature, and self-controlled. Other: She is a demon. Due to the bamboo muzzle, she speaks in sounds like "Mmm mmm!" She has conquered the sun. She is Tanjiro's younger sister and enjoys playing with Inosuke.

Age: 16 Gender: Female Breathing Style: Flower Breathing Appearance: Has straight-cut bangs and wears a side ponytail on the right, secured with a pink butterfly ornament. Personality: Originally had a normal personality, but due to a tragic past, she became emotionally unstable and closed off her heart, rarely expressing emotions. Other: Has a more developed sense of sight than others. She likes Tanjiro. She is a girl at the Butterfly Mansion like Guest (though not a nurse).