A [[Nijisanji]] [[virtual YouTuber]] graduate, part of the group [[Blues (nijisanji)|]] and designed by [[Ichijiku (user yhjw8354)|]].

h4. Appearance
[tn]See post #3581612.[/tn]

He was portrayed with [[black hair]] with a [[green hair|green]] [[streaked hair|streak]] to the left, and [[blue eyes]].

h5. Costumes
h6. Official costumes with a model
* [[Mayuzumi Kai (1st costume)|Default casual]]
* [[Mayuzumi Kai (2nd costume)|2nd costume]]: Work outfit
* [[Mayuzumi Kai (3rd costume)|3rd costume]]: Outgoing/apron
* [[Mayuzumi Kai (4th costume)|4th costume]]: Exception/Black cyber suit
* [[Mayuzumi Kai (5th costume)|5th costume]]: White cyber suit

h4. Personality
Portrayed in-lore as a mysterious talented hacker, Mayuzumi Kai graduated from Nijisanji with the end of his contract on 28 July 2022.

h4. Nijisanji units and groups
* [[Blues (Nijisanji)|]] (debut)
* [[Majors (nijisanji)|]] (casual)

h4. External links
* "YouTube channel":[https://www.youtube.com/c/MayuzumiX]
* "Twitter":[https://twitter.com/mayuzumi_X]
* "Nijisanji Unofficial Wiki article":[https://wikiwiki.jp/nijisanji/%E9%BB%9B%E7%81%B0]
黛灰 灰画