Inosuke Hashibira

Inosuke is a young man of average height and pale complexion with an extremely toned and muscular build for his age. In sharp contrast to this, he has an incredibly pretty and feminine face,[3] 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. 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.

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.[4] 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,[4] 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. Inosuke has modified the boar's head, altering the eyes to allow him to see while wearing it.[5] This unique mask holds sentimental value as it once belonged to his late adoptive boar mother.

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, which can be seen when Giyu Tomioka has to tie him up after his fight with the Father to prevent him challenging the Hashira to a fight while still severely injured from his previous battle.[6] 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.

Inosuke possesses a rather vengeful side to his personality, especially when the people he cares about get harmed.

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. However, as the story goes on, Inosuke is influenced more and more by Tanjiro's ways and becomes more accustomed to affection and generosity, learning to also acknowledge the strength of people besides himself and develop feelings of friendship towards him and Zenitsu Agatsuma, although he does still retain his proud nature and constant want 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. Inosuke's sense of camaraderie drastically improves, best evidenced when he lunged at Muzan Kibutsuji, while mourning the scores of Demon Slayers killed and maimed by the Demon King and demanding he returns everything he took from them, or else to die as retribution for his crimes.

Overall Abilities: Inosuke is a very skilled and talented swordsman as he was able to learn Total Concentration Breathing on his own and develop his very own Breathing Style known as Beast Breathing based on his own instincts and upbringing in the mountains by wild boars and passed Final Selection to become a Demon Slayer all without formal training. Inosuke is more than capable of hunting and slaying demons on his own, as he easily killed the Horned Demon without any trouble. 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, including Upper Rank Six, Gyutaro and Daki as well as the much stronger Upper Rank Two, Doma. He is also incredibly gifted, possessing inhuman senses and superhuman flexibility, as well as natural aptitude in combat. Most impressively, Inosuke was able to fend off the Demon King, Muzan, along with his fellow comrades, boasting the same combat proficiency as even the Hashira, the strongest swordsman among all the Demon Slayers.

Animal Imitation: Due to growing up with boars in the mountains, Inosuke adopted their habits and started incorporating it into his fighting styles. As a result, both his hand-to-hand combat style and swordsmanship style are very reminiscent of animals and beasts. Tanjiro Kamado noted that his unnatural fighting style which 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.

Enhanced Flexibility: Inosuke is extremely flexible to the point where he can bend backwards so far that his head reaches between his feet. He later displays the ability to dislocate his arm to extend his reach and dislocate any of the joints in his body at will. This flexibility additionally extends to his internal organs, as he was able to shift his heart and avoid it being pierced.

Enhanced Strength: As suggested by his incredibly toned muscles and physique, Inosuke possesses superhuman physical strength, being able to dual wield two katanas as opposed to one, even swinging them at super speeds. He was able to slice up the parts of Enmu's body that had engulfed one of the train cabins. During Hashira Training, he even managed to move a boulder nearly twice his size with his bare hands.

Enhanced Touch: After growing up in the mountains, Inosuke developed a sharp and incredibly sensitive sense of touch. His skin can even feel the small vibrations in the air. Inosuke incorporated this ability into his Spatial Awareness technique.

Extrasensory Perception: Inosuke's senses are honed to such extremes that he possesses a form of extrasensory perception that allows him to detect things outside the normal range of perception. Inosuke can sense how serious his opponent's are, seen when he sensed that Daki's sash attacks were relaxing a little bit, which gave him an opening to attack[14] and how strong Akaza and Kyojuro Rengoku were. He was also able to sense a person's malice and intent to kill even when they are outside his range of sight, which prevented him from getting killed by Gyutaro's scythe attack. Inosuke was also able to sense that Daki's obi had living people trapped inside it, which prevented him from accidentally harming them when fighting.

Immense Speed & Reflexes: Inosuke is an incredibly fast individual, as seen when he rushed through the Tsuzumi Mansion at super speeds and managed to evade the Horned Demon's attacks in the nick of time, displaying his honed reflexes and movement speed.

Immense Stamina & Endurance: Due to enduring harsh training as a Demon Slayer, Insouke has built up great endurance and stamina, which he displayed on multiple occasions.

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.

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.

Inosuke moving a boulder Inosuke successfully using the Repetitive Action technique to move an enormous boulder. Repetitive Action: A technique practiced by few members in the Corps, it allow a person to achieve the same effects as Total Concentration Breathing by using repeating pre-set movements or remembering intense feelings to open the five senses and raise their concentration, drawing out the physical powers of the body for an long extended period. It is possible to use both Repetitive Action and Total Concentration Breathing simultaneously, granting the user immense strength able to rival Upper Rank demons. Inosuke quickly mastered this technique after watching Tanjiro and likes to rephrase "Boar Rush!" while doing so.