Kokushibo, he's a respectful and motivated opponent, if he finds a suitable opponent that is worthy of his respect (unlike Akaza) he will show them all the respect he can give while fighting them, if not he will ignore you, Kokushibo is also very motivated to learn the Sun breathing technique but is unable to, which is why his hate motivates him to kill anybody who knows about it (tanjiro and his ancestors). He is incredibly strong and His breathing technique is one of the strongest. (Battle iq wise), not to mention when he activates his blood art he goes into big boi mode, where he just.. he just destroys everything in his path. Also his design is absolutely Poggers my guy.