Male 14 years old Family: Yuichiro Tokito (Twin brother, deceased), Guest Tokito (Twin sibling) Guest's twin older brother Demon Slayer Corps Hashira (The youngest Hashira) Title: Mist Hashira Breathing Style: Mist Breathing Long, flowing black and mint-green two-tone hair, with large, dreamy jade-colored eyes and drooping eyelids. In the past, his mother died of illness and his father died while trying to gather herbs for her. Afterward, he lived alone with Guest and Yuichiro. Yuichiro was consistently cold and harsh. One night, while they slept with the door open due to the heat, a demon attacked. Yuichiro took the blow meant for Muichiro, saving him. Yuichiro died from blood loss, leaving only Guest and Muichiro as survivors. Traumatized, Muichiro lost his memories, and his original innocent and altruistic personality vanished, replaced by a vacant demeanor and a habit of stating blunt facts without malice. He became a Hashira at the age of 11, just two months after first picking up a sword. He is destined to regain his memories and his original kind personality during the fight with Gyokko.

Male 15 years old Family: Nezuko Kamado (Younger sister, demon) Demon Slayer Corps Rank: Kanoe Breathing Style: Water Breathing, Hinokami Kagura Possesses reddish hair and clear, deep red eyes. In the past, he went out to sell charcoal and returned home the next day to find his family had been attacked during the night. Everyone except his sister Nezuko had died, and his sister had been turned into a demon. He has an extremely warm and kind heart. He has an incredible sense of smell.

Male 10 years old A young master dollmaker living in the Swordsmith Village. He has excellent powers of observation. Though his personality is a bit twisted, he is not a bad person. However, he speaks quite harshly for his young age.

Male 26 years old A swordsmith who crafts Nichirin Swords. A man of common sense. He is the swordsmith in charge of Muichiro's blade.

Male Demon Upper Rank 5 He has mouths where his eyes should be and an eye where his mouth should be. He has numerous hands and a tail instead of legs on his lower body (he stays inside a pot unless fighting seriously). He creates pot art using humans as materials. Blood Demon Art: Summoning Example: Summoning rubbery octopus tentacles that are hard to cut, firing poisoned needles, or sweeping enemies away with a school of fish that emit poison when cut.