The peko peko catchphrase comes from Usada Pekora, a Japanese VTuber with Hololive who debuted in 2019 and built a persona around a mischievous rabbit girl. She peppers her streams with the chant as a verbal tic, and fans clipped it for memes, remixes and chat spam. It spread through VTuber highlight channels and TikTok edits, becoming shorthand for playful trolling in anime meme culture. The sound endures because it is instantly recognizable to Hololive fans and works as a cute audio signature.