Kotetsu

None

An apprentice swordsmith responsible for maintaining the Yoriichi Type Zero training doll; helps guide Muichiro out of Gyokko's pot trap and assists the village's defense despite having no combat training himself.

An orphaned young apprentice smith who always wears a full-face mask to hide burn scars underneath, dressed in simple village work clothes.

Insecure about his hidden scars but earnest, brave and resourceful, growing more confident after bonding with Tanjiro and Genya during the attack on the village.