Kizuna AI is a Japanese virtual YouTuber and fictional character currently part of Kizuna AI Inc., a subsidiary of digital entertainment company Activ8. From her debut in 2016 until 2021, she was the most subscribed VTuber on YouTube, with more than 4 million subscribers across three YouTube channels, 1 million subscribers on Chinese video platform Bilibili. Kizuna AI posted her first YouTube video on her "A.I.Channel" on 29 November 2016. A second channel, "A.I.Games", was opened in March 2017 for gaming content, and a third, "A.I.Channel China", opened in June 2019 for a Chinese audience.
Although the first channel to use a CG avatar for vlogging purposes on YouTube was the channel of English-Japanese Ami Yamato, who debuted her first video in 2011, Kizuna was the world's first modern virtual YouTuber with characteristics typically ascribed to them, much like the one who coined the term Virtual YouTuber. Kizuna's video content is similar to many other YouTubers, consisting primarily of discussions, Q&A videos, and more traditional "Let's Play" videos, although in years later, she also began to livestream at least one time per week.
From Wikipedia (https://en.wikipedia.org/wiki/Kizuna_AI) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)