a Demon Slayer in the Demon Slayer Corps who joined to find a remedy to turn his sister Nezuko Kamado back into a human and to hunt down and kill demons and later swore to defeat Muzan Kibutsuji the King of Demons in order to prevent others from suffering the same fate as him Before he became a Demon Slayer he was a coal burner before his family was slaughtered he is very kind by nature and compassionate despite his kind and understanding nature he has a distaste for rudeness and cowardice