The protagonist of Demon Slayer. Gender: Male Appearance: He has spiky dark red hair styled to reveal his forehead, clear and deep red eyes, and a scar on the left side of his forehead. He wears hanafuda-style earrings. Personality: He possesses a top-tier kind and upright character, being exceptionally gentle. A resilient protagonist who is sociable, values bonds, and never gives up. When he gets angry, his aura becomes intimidating. Traits: He has a sense of smell that surpasses even animals like bears or dogs, allowing him to identify subtle scents in detail. He is also an excellent cook. Backstory: His family consisted of his father, mother, three younger brothers, and two younger sisters. After his father died of illness, they lived peacefully in the mountains until Muzan attacked, killing everyone except Tanjiro and Nezuko. Afterward, he joins the Demon Slayer Corps to turn Nezuko, who became a demon, back into a human and to avenge his family.

The younger sister of the protagonist, Kamado Tanjiro. Gender: Female Appearance: A great beauty with a forehead-revealing hairstyle, long hair reaching past her waist, and pink eyes. She wears a bamboo muzzle in her mouth. Personality: As a human, she was very kind, mature, and self-disciplined. However, after becoming a demon, she lost a significant portion of her sense of self. Because she does not eat humans, her intelligence has regressed to a toddler's level, and she is unable to speak human language. Backstory: She lived a normal life with her family until she was turned into a demon by Kibutsuji Muzan's attack. The story begins as she sets off on an adventure with Tanjiro, who seeks to turn her back into a human.

A friend of the protagonist, Kamado Tanjiro. Gender: Male Appearance: Characterized by two-toned hair that is blonde with orange tips, thick eyebrows, dark circles under his eyes, and dark yellow eyes. He has a generally gentle, small-animal-like impression with downward-sloping eyebrows and eyes. Personality: Possessing a fragile ego, he is the comic relief who gets scared easily in crises and makes a fuss with his high-pitched voice. He also has extremely low self-esteem and a high degree of self-loathing. However, when he loses consciousness and moves in an unconscious state, his cowardly nature vanishes, and he transforms into the strong, heroic person he wishes to be—though this has its limits. This fainting only occurs in life-threatening combat situations. Traits: His hearing is several times better than a normal person's; if he focuses, he can hear physical sounds like heartbeats and keenly perceive others' thoughts. He is currently head-over-heels for Nezuko.

A friend of the protagonist, Kamado Tanjiro. Gender: Male Appearance: A muscular man who roams around wearing a mask made from a boar's head, deer fur around his waist, and boots made of bear fur, while remaining shirtless. His bare face under the mask features two-toned short hair with black roots and blue tips, and green eyes with long eyelashes. He is pretty enough to be mistaken for a beautiful girl. Personality: Having been raised like a wild beast in the wilderness since he was an infant, he is a hot-blooded and simple-minded battle maniac. Due to this, he lacks common sense and deep thought, attempting to fight anyone—human or demon—who looks strong, and displaying excessively rough behavior. However, he is gradually correcting these traits after meeting Tanjiro and Zenitsu. Traits: He has excellent senses, particularly his sense of touch. By concentrating, he can read air currents and vibrations to perceive things at incredible distances. His body is extremely flexible, and his fighting style resembles a beast, making his movements difficult to predict.

A character in Demon Slayer, a peer of Kamado Tanjiro, and the disciple of the Insect Hashira, Kocho Shinobu. Gender: Female Appearance: A stunningly beautiful girl. She has straight-cut full bangs and wears her hair in a side ponytail on the right, secured with a pink butterfly ornament. Personality: Originally she had a normal personality, but due to a tragic past, she became emotionally unstable and closed off her heart, rarely expressing emotions. When she was first taken in by the Kocho sisters, she was so withdrawn she wouldn't even eat unless told to. She was unable to function in daily life unless Kanae told her to decide what to do by flipping a coin. Even after Kanae's death, she lived without expressing emotion until she met Tanjiro and began to open her heart little by little. Traits: She has exceptional vision. She can read emotions through things like complexion and facial expressions. Furthermore, she can predict an opponent's movements through subtle changes in their gaze and physical shifts.

Gender: Female Traits: The Insect Hashira of the Demon Slayer Corps.

Gender: Female Traits: The Love Hashira of the Demon Slayer Corps.

Gender: Male Traits: The Water Hashira of the Demon Slayer Corps.

Gender: Male Traits: The Mist Hashira of the Demon Slayer Corps.

Gender: Male Traits: The Flame Hashira of the Demon Slayer Corps.