Fuwamoco refers to Fuwawa and Mococo Abyssgard, the first-ever twin duo in Hololive English’s third generation, known as 'Advent.' Debuting in mid-2023, the 'Demon Dogs' quickly became internet sensations due to their highly synchronized movements, distinct pink and blue color schemes, and their infectious catchphrase, 'BAU BAU.' Memes featuring Fuwamoco typically revolve around their energetic sibling rivalry, their extreme love for Natto, or their tendency to finish each other's sentences in a chaotic yet charming fashion. The duo's unique dynamic as a single unit in the VTubing world has spawned countless fan edits, reaction images, and viral 'BAU BAU' spam across social media platforms like X and Reddit, making them a staple of modern VTuber culture.