Inosuke Hashibira

thumb|Inosuke trying to instigate a fight over a futon.|left 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 is 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 Father of the Spider Family to prevent him challenging the Hashira to a fight while still severely injured from his previous battle. 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. thumb|Inosuke's anger towards Doma.| Inosuke 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 Rank by himself and declaring he would create hell for him. Additionally, in the final battle against Muzan Kibutsuji, he challenged the Demon King 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. He also cannot read or write and struggles to say people's names correctly, saying Monchiro instead of Tanjiro or Monitsu instead of Zenitsu. In part due to his lacking understanding of the norms and customs of people, Inosuke can be rude without malicious or outwardly negative intentions, and he initially treated everyone as an enemy at first. Inosuke feeling giddy from Tanjiro's kindness towards him. However, as he continues to learn and grow along in his Demon Slayer career, Inosuke is influenced more and more by Tanjiro's ways and becomes more accustomed to affection and generosity. After almost being killed by Father of the Spider Family on Mount Natagumo and witnessing the death of the Flame Hashira, Kyojuro Rengoku, by the hands of the Upper Rank Three, Akaza, he also learnt to acknowledge, respect and even admire the strength of other people besides himself and develop feelings of friendship towards him and Zenitsu Agatsuma, though he does still retain his proud nature and constant desire for praise. He also begins to think more strategically when engaging in combat, using smarter tactics he has picked up from more experienced Demon Slayers and not just rushing into fights head-on without thinking. Most notably, Inosuke's sense of camaraderie drastically improves; once a solitary fighter who did now know the value of being with others, he first learnt to work with Tanjiro to battle a more powerful foe than he could handle alone. He would later show his newfound understanding in the value of working and bonding with others when he teams up with more and more people to defeat demons, such as helping Tanjiro against Enmu, joining him and Zenitsu in a frontal charge against Daki, and working with Kanao Tsuyuri to defeat Doma. The growth he experiences as a person when compared to his initial character was best demonstrated when he lunges at Muzan by himself while mourning the scores of Demon Slayers killed and maimed by the Demon King, demanding he return everything he took from them or else die as retribution for his crimes.

Inosuke is a young man of average height and pale skin complexion with an extremely toned and muscular build for his age. In sharp contrast to this, he has an incredibly pretty and feminine face, which made Zenitsu almost believe that he was a girl. He has large, wide eyes that are framed by an array of long eyelashes, their iris a dark to soft pale green with black pupils that has a small, white dot on the center of the pupils, thin eyebrows, and what could be a small, well-mannered mouth. His thick, raven-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. Inosuke, in his unique fashion, has customized his Demon Slayer uniform to suit his personal style. His altered attire consists of baggy hakama pants in a dark gray-blue shade, secured at his hips with a thick belt adorned with fluffy brown deer fur. Unlike his fellow companions, Inosuke forgoes wearing a haori. Instead of the customary leg wraps, he opts for knee-high socks made from bear hide in a black color tone, which serve as a base for the sandals he wears. Notably, his heels and toes are left exposed. However, the most distinctive aspect of his appearance is the gray, hollowed-out boar's head that he wears as a mask, with sky blue eyes with darker blue irises and black pupils, a pink snout, and a shade of pink on both of the upper portion of the ears. Inosuke has modified the boar's head, altering the eyes to allow him to see while wearing it.

Overall Abilities
thumb|Inosuke going toe-to-toe with Doma, the second strongest member of the Twelve Kizuki. Inosuke is a very skilled and talented swordsman; he was able to learn Total Concentration Breathing on his own, develop his very own Breathing Style known as Beast Breathing based on his own instincts and observations of wild animals, gained the necessary survival skills to live in the mountains, and pass Final Selection to become a Demon Slayer, all without formal training. Even in his first appearance, Inosuke is shown to be more than capable of hunting and slaying demons on his own, as seen when he easily killed the Horned Demon without any trouble. After Rehabilitation Training, he was able to face Lower Rank One Enmu, who received a high dosage of Muzan's blood, alongside his companions, and was pivotal in his defeat. His individual skill drastically improves due to partaking Hashira Training, to the point he was seen defeating hordes of demons on par with the Lower Ranks in strength within the Infinity Castle for hours. He has shown on multiple occasions to be able to hold his own and contribute in fights against Upper Rank demons of the Twelve Kizuki, which was considered to be the equivalent of 5 to 10 years of intensive training, namely the dual Upper Rank Six's Gyutaro and Daki, who have killed and devoured a combined total of 22 Hashira, as well as the far more powerful Upper Rank Two, Doma. He is also incredibly gifted, possessing an inhuman sense of touch and enhanced flexibility, as well as a natural aptitude for combat and a keen intuition. As further evidence to his talent, whereas Tanjiro Kamado took more than three weeks to learn Total Concentration: Constant, Inosuke took only 9 days to master the technique and he was also able to learn and master Repetitive Action after seeing Tanjiro using it a single time. Most impressively, Inosuke was able to fend off the Demon King, Muzan, alongside his fellow comrades, boasting the same combat proficiency as even the Hashira, the strongest swordsmen among all the Demon Slayers. thumb|"''It's just like battling a four-legged beast!''" Animal Imitation: Due to growing up in the wilderness of the mountains, Inosuke observed the wild animals that lived there and incorporated their combat habits into his fighting styles. As a result, both his hand-to-hand fighting style and swordsmanship style are very animalistic, bearing little resemblance to traditional martial arts. Tanjiro Kamado noted that his unnatural fighting style resembles that of a "four-legged beast" due to how his attacks come from an extremely low angle while also being very ferocious and utilizing other unorthodox movements, thus making him very unpredictable and vicious. Indomitable Will: Inosuke possesses an incredible and undaunted will and spirit, never faltering and remaining steadfast and courageous in the face of any foe, to the point where it endangers himself. His willpower was best displayed during his battle against Upper Rank Two, Doma, where, despite sustaining dozens of injuries, he refused to give up and continued to fight the demon despite his overwhelming power. Even in the face of the Demon King, Inosuke remained steadfast and never gave up. Poison Resistance: Inosuke was able to resist and survive the effect of Upper Rank Six's poison to a certain extent, although it was considered incredibly deadly, which suggests that he may have complete immunity to some poisonous substances. However, as stated by Aoi Kanzaki, this also means that none of Shinobu Kocho's medicines will work on him, so if he is exposed to a stronger poison than that of Gyutaro or one that he has not developed a resistance to, they cannot be used as a remedy, and he is in greater danger of death.