Artist.

Japanese name: ウシマド (Ushimado)
Circle name: SPROCKET (スプロケット)

h4.See also

* Pixiv account: http://www.pixiv.net/member.php?id=2006151
* NicoNico Douga account: http://www.nicovideo.jp/user/10243315
* NicoNico Seiga images: http://seiga.nicovideo.jp/user/illust/10243315?target=illust_all 
ushimado