The clip circulates under the name Rayjii, with 'nanii' written as a playful, elongated spelling of the Japanese interjection nani. In online meme culture, that single word has become shorthand for sudden disbelief, especially in anime edits, reaction videos and short-form clips where a creator wants the audience to feel the shock at the same moment as the character. Its appeal is its brevity: at well under a second, it can be dropped into fast-paced edits without slowing the joke, and it remains recognisable even to viewers who do not speak Japanese.