Artist.
Japanese name: 丸尾 (まるお, Maruo)
The other names: 音丸 (Otomaru, reading is a best guess) or おまる。 (Omaru.)
Circle name: Mix!
Joint circle name: O.M.D
https://www.pixiv.net/users/1932379
https://www.pixiv.net/stacc/0maru
https://twitter.com/OMD_info
https://twitter.com/arcana_maaru
https://twitter.com/intent/user?user_id=348098122
https://twitter.com/intent/user?user_id=3051906823
https://sketch.pixiv.net/@0maru
https://www.pixiv.net/users/6039211
https://www.pixiv.net/stacc/00maruo
