kind-hearted protagonist of Demon Slayer. After demons kill his family and turn his sister Nezuko into a demon, he joins the Demon Slayer Corps. He wields Water Breathing (and later Sun Breathing techniques), guided by an exceptional sense of smell and unyielding empathy—even toward demons.

wild, boar-masked warrior raised by mountain boars. Hot-headed and battle-crazed, he fights using Beast Breathing with dual serrated blades. Beneath his aggressive, prideful exterior lies fierce loyalty and surprising growth.

cowardly, crybaby swordsman who joined the Corps to impress a girl. He masters Thunder Breathing but only unleashes its full power when unconscious or asleep. Despite constant complaining and fear, he shows moments of true bravery and loyalty to his friends.