Artist.

Japanese name: 飴 うさこ (Ame Usako)
The other names: うさこ (Usako) or あめちゃん
Circle name: うさひらっ! (UsaHira!) (the other member: "Hirari_(tragic))":http://www.pixiv.net/member.php?id=4745527 
Site name: 飴もぐもぐ
ame usako