Artist.

Names: "katahira" or "hiyama"
Old name: "o"

h4.See also

* Pixiv account (katahira): http://www.pixiv.net/member.php?id=11312586
* Pixiv account (hiyama) [deactivated]: http://www.pixiv.net/member.php?id=3133819

katahira (hiyama)