Tetsudoji

Following the custom of the village smiths, Tetsudoji conceals his face behind a Hyottoko mask, his marked by large, dark, blocky eyebrows. He dresses in an olive haori striped in a paler shade, loose dark-gray trousers gathered just above the ankles, and a black cloth wound around his head.

His character is sketched only lightly. His loyalty to the village seems strong, since he and the other smiths are introduced clutching blades, apparently to safeguard them amid the chaos. He shows tenderness too, weeping at the sight of Tanjiro embracing the sister he believed lost. He can also act on impulse, jumping to the wrong conclusion that Tanjiro had died when the slayer collapsed.

During the later stage of the Swordsmith Village attack, Tetsudoji hides in brush on the village edge with fellow smiths Tetsumotonaka and Tetsutani, guarding a cache of swords. They are discovered by Urami, a manifestation of Upper Rank Four Hantengu's resentment. Armless and badly wounded, the giant demon hunts humans to feed his failing regeneration and gives chase as the smiths flee.

An injured Tanjiro, handed a blade by the Mist Hashira Muichiro Tokito, catches Urami and beheads him, only for the demon to regrow and keep pursuing. Dawn then sets both demons burning, yet Urami's bulk lets him endure the light long enough to threaten the smiths. Nezuko kicks Tanjiro free so he can save them at her own expense. Tanjiro severs Urami's arms, frees the captured smiths, and cuts down Hantengu's true body. Tetsumotonaka and Tetsutani then reveal Nezuko survived. When Tanjiro faints from his wounds, Tetsudoji panics and declares him dead, earning a scolding from the other two. After the village's ruin he is presumed to have moved to a backup settlement, and he is implicitly referenced when Gyomei Himejima praises Tanjiro for choosing the smiths over his sister.