A-set, real name Iris Sagan (左岸 イリス, Sagan Irisu), is a female Japanese and English Virtual YouTuber who was created by Kozaki Yūsuke and Uchikoshi Kotaro for the Japanese video game developer Spike Chunsoft. She is one of the main characters of the Spike Chunsoft game AI: The Somnium Files. In-universe, she belongs to the idol agency Lemniscate. Her presence on YouTube and social media began as part of a Viral Marketing Campaign to promote AI: The Somnium Files. She also occasionally makes tweets and videos about other Spike Chunsoft games, and comments on gaming news in general. On July 2019, she went into semi-retirement. With two bonus videos being uploaded post-release. Both the Western and Japanese accounts still actively tweet, with the latter tweeting daily, mainly to promote other Spike Chunsoft games.
YouTube
YouTube is an American video-sharing website. YouTube allows users to upload, view, rate, share, add to favorites, report, comment on videos, and subscribe to other users. It offers a wide variety of user-generated and corporate media videos. Available content includes video clips, TV show clips, music videos, short and documentary films, audio recordings, movie trailers, live streams, and other content such as video blogging, short original videos, and educational videos. Most of the content on YouTube is uploaded by individuals, but media corporations including CBS, the BBC, Vevo, and Hulu offer some of their material via YouTube as part of the YouTube partnership program.
