__Debut date:__ Jul 28, 2019
__Graduation date:__ Jul 28, 2022
__Fanbase name:__ ListeNerds
__Illustrator:__ Ichijiku ([Twitter](https://twitter.com/1ji9_1109))
[Profile](https://www.nijisanji.jp/members/kai-mayuzumi) | [YouTube](https://www.youtube.com/channel/UCb5JxV6vKlYVknoJB8TnyYg) | [Twitter](https://twitter.com/mayuzumi_X) | [Twitter (Sub)](https://twitter.com/BBash_Shell)
Mayuzumi Kai is a male Japanese Virtual YouTuber and a member of Nijisanji.
An aloof and talented white-hat hacker who began livestreaming as part of an undercover investigation. He rarely goes outside and orders everything online.
