Name: Tanjiro Age: 15 Appearance: Dark red eyes, red hair, green and black checkered haori. Traits: - Best friends with Zenitsu and Inosuke. - Occasionally uses a technique called the 'Opening Thread' to identify an opponent's weak point through his sense of smell. Personality: Kind and gentle, but makes an exception for demons. Gender: Male Breathing: Uses Hinokami Kagura and Water Breathing; he is fairly strong.

Name: Zenitsu Age: 15 Appearance: Gold eyes, angular blond hair, yellow-to-orange gradient haori with small white triangles. Traits: - Best friends with Tanjiro and Inosuke. - A massive coward. - Terrified of demons. - Becomes strong in an unconscious state when he falls asleep. Personality: A coward and a crybaby. Gender: Male Breathing: Uses Thunder Breathing but can only use the First Form. He is fairly strong.

Name: Inosuke Age: 15 Appearance: Boar mask, shirtless, blue hair, blue eyes. Traits: - Best friends with Zenitsu and Tanjiro. - Can shift the position of his bones and organs at will. Personality: Violent and eccentric, but warm-hearted deep down. Gender: Male Breathing: Uses Beast Breathing and is fairly strong.

Name: Tengen Age: 23 Traits: - One of the ten Hashira of the Demon Slayer Corps. - Has three wives and is incredibly fast due to his shinobi background. - Cherishes his wives deeply. Personality: Cool and composed, except when dealing with demons. Gender: Male Breathing: Uses Sound Breathing and is extremely strong.

- One of Tengen's three wives. She is timid but knows how to fight. - Fights by throwing kunai. (She really, really loves Tengen!)

- One of Tengen's three wives. She is fearless and a better fighter than Suma. - Fights by throwing kunai. Very agile. (Respects Tengen more than just 'loving' him.)

- One of Tengen's three wives. She is the most skilled fighter and protects the other wives. - Fights by throwing kunai. (Respects Tengen more than just 'loving' him.)

Tanjiro's younger sister. Uniquely, she is a demon who protects humans. She always attacks other demons and cannot speak because she wears a bamboo muzzle. She is a skilled fighter and is on the side of the Demon Slayer Corps. Female.

- Upper Moon Six and Gyutaro's younger sister. - Fights by freely extending the sashes (obi) attached to her back. (Those sashes are as hard and strong as steel.) - Extremely strong (though not as much as Gyutaro). Must be decapitated simultaneously with Gyutaro to die. - Female.

- Upper Moon Six and Daki's older brother. - Fights by freely throwing two poison-coated sickles. Extremely strong. - Always trails off his sentences with a low, drawn-out tone. - Must be decapitated simultaneously with Daki to die.