Muichiro Tokito

Muichiro is a young boy of fair skin and short stature with a lean muscular build along with long, straight hair of a Raven-Black color that fades to a Cyan color as it approaches his waist. He wears his hair loose with two clumps protruding slightly from each side of his head, a set of marginally shorter hair left down to frame his face, and unruly bangs over his forehead. He also possesses large, empty-looking Soft Cyan eyes. He is identical in appearance to his older twin brother Yuichiro.

Following his meeting with Tanjiro Kamado and the return of his childhood memories, Muichiro's once empty looking eyes seem to now have a hopeful glimmer that is accompanied with a more upbeat and cheery expression, reminiscent of his former demeanor before the death of Yuichiro.

Muichiro wears a dark, slightly cyan-tinted version of the Demon Slayer uniform. His uniform has longer, looser sleeves that are more reminiscent of those of a kimono than of the standard cuffed uniform. Along with this, the lack of bands of cloth wrapped around his calves gives his hakama pants the traditional loose and sizable appearance. He also has dark blue tabi socks and a pair of white zōri with dark blue straps.

When Muichiro was young, he wore a light, sleeveless yukata with a cyan mist design, similar to the darker one his brother wore when they were both ten.

Due to Tanjiro's presence around him, Muichiro manifested his Demon Slayer Mark during the battle against the Upper Rank 5 Gyokko. Muichiro's mark is blood red colored, resembling mist shaped clouds on both his cheeks and forehead.

Muichiro is an air-headed individual who seems to constantly wander off in thought and is unable to focus on anything. Impassive and, at times, obtuse, he tends to think only for himself and operates on logic alone, never letting emotions guide him, making him seem seemingly apathetic and indifferent. However, Tanjiro Kamado sensed that Muichiro wasn't being apathetic on purpose as he didn't emanate any animosity. Despite his mostly uncaring and unserious demeanor, he has been shown to become serious when it is required and is devoted to his position as the Demon Slayer Corps' Mist Hashira. Alternatively he seems to display a cold and arrogant side; as shown by him violently shaking down Kotetsu and calling him stupid, saying his time as a Hashira was important, more so than his own, and that all that the swordsmiths could do was make weapons. Despite this, Muichiro doesn't seem to be indifferent towards Kagaya Ubuyashiki, most likely due to his immense respect for his master.After his brother was attacked by a demon and witnessing his final moments and death, Muichiro subsequently lost his memories and has held an omnipresent rage deeply suppressed inside of him that inevitably drove his future, intense training. After this memory loss, he started exhibiting the indifferent attitude of his twin brother he is now known for as a Hashira. Following his battle with Gyokko and reuniting with Tanjiro after the latter's battle with Hantengu, he warmly thanked Tanjiro for helping him regain his identity and showed concern for his wellbeing During his later interactions with Tanjiro, Muichiro started regaining his memories of his past, causing him to behave more maturely and seriously, even choosing to help Kotetsu when his life was in danger instead of ignoring him. After his memory was fully restored, Muichiro began expressing more emotions and became more confident in himself and started caring more for his peers in the Demon Slayer Corps. He also started exhibiting emotions common for someone his age, particularly childishness and immaturity when interacting with his other Demon Slayers. He also appears to be evidently biased towards Tanjiro after his battle with Gyokko in the Swordsmith Village, as his cheerful demeanor when around him was replaced by a cold indifference when around other Demon Slayers. However, he was shown to be more aware of himself and those around him, evident when he realized that Obanai Iguro had a crush on Mitsuri Kanroji, which surprised Gyomei Himejima. His kindness also aided him in building friendships among the Demon Slayers and making happy memories like the ones back when he lived with his family.