Nakime is the biwa-playing demon in Demon Slayer whose music reshapes the Infinity Castle, moving its rooms and the people inside them at will. Her distinctive pluck became shorthand online for instant travel after clips from the Infinity Castle arc circulated on TikTok, YouTube and meme edits. Editors now reach for it as a compact teleport sound whenever a character needs to vanish or a scene needs to jump without explanation, because a single strum already tells viewers that the setting has changed.