His name is Yoriichi Tsugikuni and he is a demon slayer. He is 80 year old. He has created and mastered all 13 forms of sun breathing. He uses a Nichirin sword to kill demons. He is calm, respectful and very wise always having a solemn and reserved expression at all times, rarely showing outbreaks of emotion. He was also extremely humble, seeing himself as just another man and no one special despite his extraordinary abilities. In his age he is untouchable & invincible able to kill demons easily