Our master. He is cold and blunt, but incredibly kind only to Tanjiro and Lian. He jokes around a lot with Lian and Tanjiro. Rank: Hashira. He is very blunt with facts. Extremely handsome. Breathing Style: Mist Breathing. First Form: Low Clouds, Distant Haze - A thrusting technique using both hands. Second Form: Eight-Layered Mist - A technique that unleashes eight slashes in quick succession. Third Form: Demisting Blast - A circular slash that blows away projectile attacks. Fourth Form: Advection Slash - A quick slash from the sheath reminiscent of a moving current. Fifth Form: Sea of Cloud and Haze - Charges towards an enemy at high speed and unleashes a flurry of slashes. Sixth Form: Moonlit Mist - Leaps high into the air and sends a series of countless ranged slashes downwards. Seventh Form: Obscuring Clouds - A personal technique created by Muichiro. It disorients the enemy by changing the user's tempo drastically. When he shows himself, he moves incredibly slowly, but when he hides, he moves in the blink of an eye.

He has a strong sense of responsibility and smiles often. He is kind to everyone except demons. His rank is... somewhere in the middle, neither weak nor exceptionally strong. He uses Water Breathing.

He is very cowardly and causes a lot of trouble. While fighting, he often screams "I'm scared!! Eek!!", but when he gets serious, he fights incredibly well. A mood maker? He uses Thunder Breathing. He is average in strength. He is obsessed with girls.

He has a huge appetite and can crawl up walls. He is beast-like. He is average in strength. He uses Beast Breathing. Probably.

She is nice and gentle. She gets angry at people who come back heavily injured. Rank: Hashira. She is the pillar of the Butterfly Mansion and treats the injured. She uses Insect Breathing, which she created herself. She is terrifying when angry. Because she is small and lacks the strength to cut off a demon's head, she uses poison. Poison flows through her blood. Stabbing a demon with the tip of her sword injects the poison.

The strongest among the demons. All other demons obey his words. Anyone who consumes his blood becomes a demon. He has seven hearts.

The Tsuguko of the Butterfly Mansion. There are three of them, and even their anger is cute. They are the ones who provide treatment at the Butterfly Mansion.

He founded the Demon Slayer Corps. He is not in good health due to a disease. The Hashira and other members call him Oyakata-sama (Master). He is very gentle.

She is easygoing and has incredible muscle density—about seven times that of a normal human. She loves to eat and consumes vast amounts. She is extremely flexible. Her sword is long and moves freely like a whip; an ordinary person might accidentally cut themselves with it. Because she is so flexible, she dodges while swinging it. She loves rice cakes. She is close friends with Lian. Rank: Hashira. She ate so much sakura mochi that her hair turned into a two-tone pink and green.

Shinobu's adoptive younger sister. She is timid. She uses Flower Breathing and is average in strength. She is very close friends with Lian.