Shirakami Fubuki is a fox-eared VTuber from Hololive Production who debuted in Japan in 2018 and became known for cheerful gaming streams and a bright, teasing voice. Clips of her short reactions circulate widely in anime and VTuber fan edits, where a single Japanese word can carry the whole joke. Nani simply means what, but fans latched onto her drawn-out delivery as a reusable reaction for confusion and disbelief. The clip stays popular because it is instantly recognizable to Hololive fans yet clear even to viewers who know no Japanese.