Webbut think about it after maybe the swordsmith village arc, or during the hashira training arc (im not fully thru that yet, and im anime only) he's talking to tanjiro and learns that genya gains temporary regeneration by eating demons. Tengen still has more than enough. Webwhile genya's gun and repetitive action are unique abilities, he truly stands out in his ability to temporarily become a demon. By consuming the flesh of a demon, genya is able to temporarily. Webbut it is revealed in episode 6 of season 3 (chapter 115 in the manga) that genya is, in fact, incapable of performing any breathing techniques. Webis it because muzan specifically allowed kaigaku to turn into a full demon, or is it something special about genya? I’ve seen some people say he had particularly strong digestive organs or something like that, but i can’t find anything in the manga that says anything. Webwhen genya admits that he ate a demon in his bid for strength, sanemi grows enraged and tries to maim him. Genya narrowly escapes as tanjiro comes to his rescue but ends up punching zenitsu for insulting his brother and starting a brawl, landing him in trouble with.
