Artist.

Japanese name: 十二 (Juuni) (reading is a best guess)

h4.See also

* Pixiv account: http://www.pixiv.net/member.php?id=13424094
* Tinami account: http://www.tinami.com/creator/profile/55955
* Twitter account: http://twitter.com/12_Juji
juuni (juji-12)