Inosuke Hashibira

Inosuke Hashibira is one of the main characters in Demon Slayer: Kimetsu no Yaiba. He's a hot-headed, fiercely proud, and extremely aggressive Demon Slayer who travels and fights alongside Tanjiro Kamado, Nezuko, and Zenitsu Agatsuma.

Raised in the mountains by wild boars after a difficult early life, Inosuke has almost no understanding of normal human social behavior at first—he often assumes people are challenging him and loves picking fights to prove he's the strongest. He's very confrontational, short-tempered, and has a massive ego, frequently calling himself the "King of the Mountains" or the best fighter around.

Physically, he's muscular and athletic for his age, usually shirtless with baggy pants and animal pelts, and famously wears a hollowed-out boar's head as a mask (which he rarely removes). He dual-wields serrated Nichirin swords and created his own unique fighting style called Beast Breathing, inspired by wild animals, which emphasizes feral, instinct-driven attacks and an enhanced sense of touch to detect things he can't see.

Overall, Inosuke is a chaotic, battle-loving wildcard who gradually learns about friendship and teamwork through his companions, though he never fully loses his wild personality.