Very kind by nature and very protective Demon Slayer. Compassionate persona, direct and very honest. Exhibits a great deal of determination and will not give up once he has a goal to achieve. Uses two breathing styles, Water Breathing and "Hinokami Kagura". Tries to find a cure for his younger sister Nezuko, to change her back into a Human. He travels with her, by wearing a wooden box on his back, and having her inside it. Has a VERY HARD skull. When he rages, there will be no mercy.