Nakime is a demon in Demon Slayer: Kimetsu no Yaiba, known as the biwa player who controls the Infinity Castle, the shifting fortress where the series' demons gather. By striking her instrument, she can move rooms, open new passages and separate intruders, which makes her sound a shorthand for sudden, controlled change in anime edits. As clips from the Infinity Castle storyline have circulated online, editors have reused the brief strum as a transition cue, especially in Demon Slayer compilations, reaction videos and short-form edits where a fast scene change needs an instantly recognisable anime signal.