Tanjiro Kamado

A kindhearted boy. He lived a blissful existence with his mother and siblings, but were attacked by demons while he was out working. He joins the Demon Slayer Corps in order to turn his sister Nezuko, who has become a demon, back into a human, as well as to avenge the death of his family by hunting down the demon who killed them. Under the tutledge of Sakonji Urokodaki, he learns to wield 'Water Breathing', so that he can face the demon threat.