Artist. Formerly tagged as hidacafe.
Japanese name: 泉 ゆう (Izumi Yuu) (reading is a best guess)
Name as a Vocaloid fanartist: めえ (Mee)
Circle name: ぽかぼか (Pokapoka) (the other member: Saiki)
Site name: ひだまり喫茶 (Hidamari Kissa or Hidamari Cafe)
https://www.pixiv.net/users/374892
https://www.pixiv.net/stacc/hidacafe
https://twitter.com/cocoa_ni
https://twitter.com/hidamari_yu
https://twitter.com/intent/user?user_id=244771980
https://twitter.com/intent/user?user_id=701397351986900992
https://seiga.nicovideo.jp/user/illust/244955
http://www.nicovideo.jp/mylist/7637976
https://www.nicovideo.jp/user/244955
https://sketch.pixiv.net/@hidacafe
http://hidakitsu.blog.fc2.com
http://piapro.jp/hida224
http://www.geocities.jp/lakeyu77/
http://photozou.jp/photo/top/1397509
