Kazumi

Kazumi has brown eyes with white pupils and dark brown hair. His outfit is a muted blue iromuji kimono paired with a dark obi and a light brown haori. By the time Tanjiro encounters him, his face carries bruises left by a beating.

Kazumi is a warm, devoted man who treasured his time with Satoko. Even while grieving her disappearance, he proves trusting enough to believe in Tanjiro's effort to find her. Unlike most townspeople, he had already heard rumors of demons and slayers, though seeing them in the flesh still stuns him.

When told Satoko is dead and urged to keep living, he lashes out, demanding how a stranger could grasp his pain, then realizes that his rescuer has clearly endured terrible loss of his own and regrets his harsh words.

Kazumi met and became engaged to Satoko before the events of the story. The two are walking together when she vanishes without a trace. The next day, battered from a beating by Satoko's father, Kazumi meets Tanjiro, who believes his account and follows the demon's scent.

After Tanjiro rescues Tokie and entrusts her to him, Kazumi confronts the Swamp Demon and recognizes Satoko's hairpin among its trophies, learning with despair that she was eaten. Once the demon is destroyed, Tanjiro hands him the cloth of hairpins and offers comfort.