A-Set

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.