Gawr Gura is a shark-themed VTuber with Hololive English, known for her playful voice, singing and chaotic humour, and Oh Nyo became one of her most repeated fan-favourite phrases. Fans clipped the line from her streams and shared it across YouTube, TikTok and soundboards, where it took on a life of its own as a reaction sound. Because it is short, expressive and instantly tied to Gura's personality, creators still reach for it years later to add a cute, teasing punch to memes, edits and VTuber compilations.