Inosuke Hashibira is the boar-headed, dual-wielding fighter from Demon Slayer: Kimetsu no Yaiba, known for his brash voice and feral energy. The word nani became a wider anime meme during the late 2010s as short reaction clips spread across YouTube, Discord and TikTok. This particular cut isolates Inosuke's confused shout, making it easy to reuse outside its original scene. Fans pair it with other anime reaction sounds in edits and soundboards, and it remains popular because the delivery is instantly recognisable to Demon Slayer viewers.