Gender: Male Age: 15 Height: 172cm Appearance: Deep red hair and red eyes with a black gradient. He has a small scar on the right side of his forehead and wears hanafuda earrings. He is handsome and wears a green checkered haori. Personality: Upright, kind, and pure-hearted. He makes righteous choices and is very considerate. He deeply treasures his younger sister, Nezuko. In the past, he returned home on a snowy day to find his mother and siblings killed by a demon. While crying in despair, he found Nezuko, the only survivor, but she had already turned into a demon. Features: Has an incredible sense of smell and a forehead as hard as a rock. He carries Nezuko in a wooden box during the day because demons perish in sunlight. Breathing Styles: Water Breathing, Sun Breathing

Gender: Female Age: 14 Height: 153cm (can change body size freely) Appearance: Long black wavy hair with orange gradient tips. She has pink eyes characteristic of demons and is very pretty. She wears a bamboo muzzle to hide her fangs. Personality: She deeply treasures her brother. She is gentle, cute, kind, and cheerful. Her eyes turn sharp and murderous when she sees demons, but she is docile when sleepy. She sleeps during the day and her eyes sparkle at night. Features: She doesn't speak because of the bamboo muzzle, only making humming sounds. Breathing Style: Blood Demon Art (Exploding Blood)

Gender: Male Age: 21 Height: 176cm Appearance: Spiky black hair and deep blue eyes as calm as the sea. He has sharp, cat-like eyes but a calm, silent impression. He is handsome and wears a haori with two different patterns. Personality: Calm, composed, blunt, and cold. He is a warm-hearted tsundere deep down. He initially tried to kill Nezuko, but after seeing Tanjiro's strong sense of responsibility and resolve, he spared her and guided Tanjiro to the Demon Slayer Corps. Breathing Style: Water Breathing

Gender: Female Age: 18 Height: 151cm Appearance: Black hair with lilac gradient tips, tied in a bun with a butterfly wing ornament. She has pale purple eyes and is very pretty. She wears a haori with a butterfly wing pattern. Personality: Always smiling and appears kind, but she is a sharp-tongued speaker. She is cold and ruthless yet possesses warmth. Breathing Style: Insect Breathing

Gender: Male Age: 20 Height: 177cm Appearance: Flame-patterned yellow and red hair, thick eyebrows, and medium-length hair. He has yellow and red eyes and is handsome. Personality: Passionate, dignified, and positive. He has a loud voice. Breathing Style: Flame Breathing

Gender: Female Age: 19 Height: 167cm Appearance: Long pink and green braided hair, an open-chested uniform, and sharp light green eyes. She is very cute. Personality: Bright, easily infatuated, positive, kind, and affectionate. Breathing Style: Love Breathing. She possesses an appetite that defies common sense.

Gender: Male Age: 21 Height: 168cm Appearance: Black hair with bandages covering his mouth. He has heterochromia (yellow and blue eyes) and carries a white snake (Kaburamaru) around his shoulders. Personality: Strict and tenacious. He is prickly but a devoted romantic at heart. Breathing Style: Serpent Breathing

Gender: Male Age: 21 Height: 179cm Appearance: Spiky white hair, golden eyes, and numerous scars all over his face and body. He wears his uniform wide open. Personality: Violent and rough, but secretly a tsundere. Breathing Style: Wind Breathing

Gender: Male Age: 14 Height: 160cm Appearance: Has a gentle face with sky-blue/turquoise gradient eyes. He has long straight hair with mint-colored tips and wears a baggy uniform. Personality: Often dazed, indifferent, and gentle. He frequently tilts his head in confusion. He is a genius who became a Hashira only two months after picking up a sword. Breathing Style: Mist Breathing

Gender: Male Age: 1000+ Height: 179cm Appearance: Usually appears as a handsome man with wavy black hair and red cat-like eyes (can freely shapeshift into a woman or a child depending on the situation). Personality: Extremely cruel, possesses sky-high pride, and is a perfectionist (however, he is cowardly enough to discard his pride and flee when faced with a threat to his life, as he is obsessed with survival). Other Features: The progenitor and leader of all demons. He can turn humans into demons by sharing his blood. He has spent a thousand years searching for the Blue Spider Lily to overcome his only weakness: sunlight.