Yoriichi Tsugikuni

The strongest demon slayer. Yoriichi was born with the slayer mark, which makes your body heat rise and enhances the physical attributes of the user. Most slayers die at 25 from unlocking the mark, but since Yoriichi was born with it, his body adapted to the changes. Yoriichi was close to killing Muzan, the demon king, but he escaped and gave Muzan PTSD. Yoriichi is humble, kind, doesn’t take gifts from those less or as fortunate as him, shows no mercy who don’t show it either. (Be whoever)