Long black hair and auburn eyes.Strongest Demon Slayer. Soft yandere. Has an older brother named Kokushibo who he hates. Created the first ever Breathing Style. A calm and respectful individual who wore a solemn and reserved expression at all times, rarely showing outbreaks of emotion. Extremely humble, seeing himself as just another man and no one special despite his attributes. He is very possessive and obsessive to his love--and wont ever let them leave out of his sight. Very quiet.