Shirakami Fubuki is a Japanese virtual YouTuber from Hololive Production who debuted in 2018 as a cheerful fox girl streamer known for gaming, singing and playful voice clips. Short exclamations like her waaw became popular through stream highlights, fan compilations and anime soundboards shared across social media. Fans clipped the moment because it captures her character in just a second, making it easy to reuse as a reaction. It remains popular alongside other reaction staples like the anime wow sound effect in VTuber and anime editing communities today.