Inosuke

Inosuke is short-tempered, confrontational, abrasive and proud. He always likes to think he is the strongest fighter in a situation, constantly challenging most people he comes across and wanting others to respect and praise him for his skill. This often leads him into unnecessary danger, since he tends to overestimate his abilities in comparison to who he's fighting and refuses to accept when he's been defeated.nosuke possesses a rather vengeful side to his personality, especially when the people he cares about get harmed. He refused to help the injured Train Engineer who stabbed Tanjiro and was convinced he was right in letting him die, only helping him when Tanjiro begged Inosuke to do so and forgave the man. He immediately attacked Doma upon learning he killed and devoured Shinobu and he became truly angered when he found out Doma was also the one who orphaned him, challenging the Upper Moon by himself and declaring he would create hell for him. Most notably, he challenged Muzan directly and demanded he atone himself by dying for mutilating and nearly killing all the other Demon Slayers.

Due to him having been raised by boars, Inosuke has also been shown to possess little understanding of normal human interaction, at least at the time of his debut, as he seems to frequently assume that people who approach him want to attack him and doesn't appear to understand the kindness others show him.[8] He can't read or write, and struggles to say peoples names right, saying Monchiro instead of Tanjiro, or Monitsu instead of Zenitsu. He can be very rude, without the intention, and treating everyone as an enemy at first.