The sound comes from Higurashi When They Cry, where Rika Furude uses Nipah as her signature greeting and cheerful verbal tic. The phrase first reached a wide audience through the anime adaptation, which followed the original visual novel series, and fans quickly clipped it for AMVs, reaction videos and meme edits. Like Tuturu, another beloved anime catchphrase, it works because it is short, instantly recognisable and tied to a specific character. Years later it still appears in anime compilations, TikTok edits and streams whenever creators want a cute, knowing punchline.