Kizuna AI debuted in 2016 as a Japanese virtual YouTuber and is widely credited with popularising the VTuber format online. Known for cheerful gaming videos and an idol-like persona, she built a huge following on YouTube before clips of her rarer outbursts began circulating separately. This swearing clip spread through meme pages and soundboards precisely because it breaks that persona. It remains popular with anime and gaming communities who reuse short celebrity and character outbursts as shorthand for exaggerated frustration.