Artist.
Japanese name: 有紀 (ユウキ, Yuuki)
Site name: 紅茶とパンダ
(The artist has some other accounts for real person fictions. They are not related to danbooru, though.)
https://www.pixiv.net/users/2108061
https://www.pixiv.net/stacc/yuuki-9
https://twitter.com/yuuki9_326
https://twitter.com/yuuki9_326_2
https://twitter.com/yuuki9_ura
https://twitter.com/intent/user?user_id=241844684
https://twitter.com/intent/user?user_id=306082737
https://twitter.com/intent/user?user_id=364368373
http://yuuki9.blog.fc2.com
http://yuuki9hmp.web.fc2.com
https://privatter.net/u/yuuki9_326
http://twpf.jp/yuuki9_326
http://theinterviews.jp/yuuki9
http://yfrog.com/user/yuuki9_326/photos