Artist.
Japanese name: ミズコシ (Mizukoshi)
Old names: まるみず (Marumizu) or まるみ (Marumi)
https://www.pixiv.net/users/8081125
https://www.pixiv.net/stacc/marumi910
https://twitter.com/mizukoshi14
https://twitter.com/intent/user?user_id=2418617245
https://seiga.nicovideo.jp/user/illust/35577840
https://www.nicovideo.jp/user/35577840
https://mizukoshi.fanbox.cc
https://www.pixiv.net/fanbox/creator/8081125
https://sketch.pixiv.net/@marumi910
https://skeb.jp/@mizukoshi14
https://ask.fm/mizukoshi14
