purpleflame
Artist.
Pixiv nickname: うさこ (Usako)
The other names: ももこ (Momoko), 桃兎, 美龍
See also
* Pixiv account: http://www.pixiv.net/member.php?id=2165078
* Tinami account: http://www.tinami.com/creator/profile/20834
* Suimy account: http://suimy.me/user/peachrabbit/content