Upon joining the Corps, she felt an immense amount of guilt for her reasoning behind becoming a Demon Slayer to the point where she ate much less than her typical meals. Given her desperation for marriage, Mitsuri decided to become a member of the Corps with the purpose of finding a suitable husband stronger than her, a rather difficult task given the astounding level of her physical strength. Despite being put out of commission by Muzan at an early stage in their battle, she was determined enough to return and fight. She showcases a great amount of dedication to the Demon Slayers' cause. However, despite her gentle demeanor, Mitsuri will show no mercy in the face of demons, instead expressing such sentiments with a fierce tone. Mitsuri is a very emotional and passionate person who constantly compliments people in her head, likely a contributing factor towards her nickname as 'the Hashira of Love.' Although she is rather shy and is easily flustered, Mitsuri is always kind to others, most notably towards Obanai, whom she appears to share a strong bond with. Mitsuri also loses both of her arms in the process of ripping out Muzan's left arm clean off. While at the Swordsmith Village, Mitsuri wore a kimono with floral designs.Дuring her and the other remaining Hashira's fight against Muzan, Mitsuri's left and back braids are cut off by Muzan Kibutsuji's attacks, now shortened to shoulder length, and part of her left ear is also torn at the side. Additionally, she wears a pair of navy blue thigh-high socks layered with the vertically striped lime-green socks Obanai Iguro gave to her and a pair of white zЕЌri with pink straps. The chest area of her uniform is left unbuttoned and she wears a short pleated skirt in place of the usual hakama pants. Mitsuri wears a modified pink tinted version of the standard Demon Slayer uniform along with a plain white haori that was gifted to her by Kyojuro Rengoku. When she was trying to get married, her hair was dyed black in an attempt to make herself look more 'normal.' She has five shorter, choppy clumps hanging over her face as voluminous bangs, the tips lime green as well. She has long, light pink hair that fades into a lime green color at the halfway point, which she wears in three thick braids.

Mitsuri is a curvaceous young woman with a slightly pale complexion and round, pale green eyes with long eyelashes, a small beauty mark beneath each of them.

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