Artist.
Japanese name: なつき (Natsuki)
Old names: ぐっさん (Gussan), foxone, foxone2009 or 偉紅
https://www.pixiv.net/users/862964
https://www.pixiv.net/stacc/foxone2009
https://twitter.com/natsuki_0907
https://twitter.com/intent/user?user_id=1593165037
https://seiga.nicovideo.jp/user/illust/19563700
https://www.nicovideo.jp/user/19563700