It is washable

Inosuke was a young man of average height[3]. He always wore a mask made of a boar's head[4] with grey fur and blue eyes[5]. Instead of wearing the standard Demon Slayer uniform, he wore a black Hakama with a skirt made of fur at the waist protecting his groin and genitals[6]. By not wearing the jacket of the average Demon Slayer uniform, he showed off his torso which had a completely toned and muscular appearance[7]. When not wearing his Boar mask, Inosuke's face was that of an effeminate-looking young man[8] with short dark hair with extensions in shades of blue and green eyes[9] with thick eyelashes accentuating his face with feminine features[10]

Inosuke was extremely hot-tempered, impulsive, impatient, and filled with excessive pride. His pride was such that he was even willing to fight opponents who were technically stronger than him[11]. He was not the type of person to stop and think about the difference in level that existed between him and his opponent, which often put him in serious danger of dying. This has happened on several occasions, such as when he was convinced that he could defeat the Upper Moon Six, Daki and Gyutaro, after being influenced by the words of Tengen Uzui[12]. He sometimes had trouble admitting his defeats, making him a sore loser and always trying to compete against Tanjiro Kamado and provoke him into fighting, failing miserably in his attempts. [13] Despite this, Inosuke deep down seemed to have an insecurity that he hid with his arrogant attitude for not knowing how to adapt to his surroundings and with the fear of being rejected for being different. His low self-esteem becomes known after his defeat suffered against one of the Spider Demons and then humiliated by the water pillar Giyu Tomioka, even apologizing to his companions for his weakness. Because he grew up alone in the mountains, Inosuke had trouble interacting with others and only cared about himself most of the time. However, as time goes on, he becomes more influenced by the kindness and good deeds of the people around him, and also begins to think and use strategies before facing an opponent. Whenever he interacted with other people he didn't know, the first thing he did was assume they were an enemy and thought about attacking them, ready to fight them. This may be due to having grown up surrounded by wild animals, which as an instinctive reaction to danger or something unknown, they stand on guard ready to defend themselves against any possible threat.

Similar to Tanjiro, Inosuke lacked common sense and was easily intrigued by things and places he had never seen before. When they were about to go to the train that contained the Kyojuro Rengoku Pillar, Inosuke became guarded and assumed that the train was the "boss" of that place and was prepared to fight it, only to be stopped and suppressed by Zenitsu. As the series progressed, Inosuke became more focused and concentrated on his missions as a demon hunter, demonstrated during the mission in the Entertainment District when he infiltrated as a courtesan and was silently investigating the possibility of the presence of a demon in that place, also demonstrating a competent ability to analyze and intuit.

High Sensitivity of Touch: As a result of living in the mountains for most of his life, Inosuke had developed a rather acute sense of touch. Thanks to this highly developed sense, he was able to sense even the slightest vibration in the air, thus managing to detect both enemies and allies.

Flexibility: Inosuke had complete control of his own body, even being able to dislocate the joints of his limbs to execute more effective attacks at greater distances. He was also able to move in tight spaces.

Ability to move organs at will: This ability allowed him to move his vital organs around his body, preventing them from being damaged by any external physical attack.