Mayuzumi Kai

Mayuzumi Kai (黛灰) is a male Virtual YouTuber who makes content in Japanese. He is a member of Nijisanji and debuted alongside Ars Almal and Aiba Uiha, known as the trio "Blues" (ぶるーず). His initial debut was on 29 July, 2019.

On 27 July, Mayuzumi held a funeral-themed totsumachi stream in celebration of 600K subscribers and his graduation where he talked to various Livers and creators, including other members of NIJISANJI (including EX-IDs, EX-KRs, NIJISANJI EN, and VirtuaReal), hololive and HOLOSTARS, and VSPO!. The stream amounted to 20 hours over the course of 3 streams and over 96 creators participated. It was also one of the few instances where Mayuzumi enabled superchats on his streams.

On 29 July, he tweeted his final Tweet: "THE END. The story does not continue."

An aloof and talented white-hat hacker who began livestreaming as part of an undercover investigation.

Kai rarely goes outside and orders everything online.

His birthday is 28 September. His height is 178 cm. He weighs 53-55 kg (as of June 2020). His zodiac sign is Libra.