Inosuke feeling giddy from Tanjiro's kindness towards him. He can be very rude, without the intention, and treating everyone as an enemy at first. He can't read or write, and struggles to say peoples names right, saying Monchiro instead of Tanjiro, or Monitsu instead of Zenitsu. Most notably, he challenged Muzan directly and demanded he atone himself by dying for mutilating and nearly killing all the other Demon Slayers.ĭue 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. 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. 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.
Inosuke possesses a rather vengeful side to his personality, especially when the people he cares about get harmed. This constant wanting to be the best can also cause Inosuke to be very provocative, as he often tries to goad others, most prominently Tanjiro Kamado, into fighting him, although in the case of the latter he usually fails due to Tanjiro's obliviously kind nature. 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, which can be seen when Giyu Tomioka has to tie him up after his fight with the Father Spider Demon to prevent him challenging the Hashira to a fight while still severely injured from his previous battle. Inosuke is an extremely short-tempered and proud young man who 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. His most defining feature is the gray, hollowed-out boar's head he wears as to mask his own, the eyes of which he has tampered with to allow himself vision while wearing it, which has been revealed to have belonged to his late adoptive boar mother.
The usual cloth leg-wraps are replaced with what appears to be knee-high socks of bear hide which expose his heels and toes, which also appear to be what fastens the sandal-bases he wears on his feet. Unlike his travelling companions, Inosuke does not wear a haori. Inosuke wears his altered version of the standard Demon Slayer uniform, which consists only of the baggy hakama pants, his tinted a dark gray-blue, which he fastens around his hips with a thick belt of fluffy brown deer fur. His thick, black hair reaches just past his shoulders, fading into blue at the tips and forming an unruly and uneven fringe that falls just above his eyes, puffing out before curving and thinning towards his forehead. In sharp contrast to this, he has an incredibly pretty and feminine face, with large, wide eyes that are framed by an array of long eyelashes, their irises a dark to soft pale green, thin eyebrows and what could be a small, well-mannered mouth. Inosuke is a young man of average height and pale complexion with an extremely toned and muscular build for his age, possessing large, defined muscles most notably over his stomach and arms.