Sumi Nakahara

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Sumi has no combat training, but along with Kiyo and Naho she helps teach Tanjiro the fundamentals of Total Concentration: Constant breathing during his recovery.

Sumi is a young girl with pale skin, button-like black eyes, and black hair worn in twin low pigtails fastened with light blue butterfly clips, dressed in a white nurse's uniform.

Bright, cheerful, and helpful despite losing her family to demons, Sumi treats her work at the Butterfly Mansion with warmth and maturity beyond her years.