Nakime is the biwa-playing demon in Demon Slayer: Kimetsu no Yaiba who controls the Infinity Castle, moving its rooms and passages with each note of her instrument. Her strums became a recognizable audio cue in the anime because they mark moments when the castle rearranges itself or characters are sent elsewhere. Clips of the sound spread through anime edits and soundboards, where fans reuse the pluck as shorthand for teleportation, disorientation, and a sudden ominous shift in any scene.