Artist.

Artist name: 53 (reading seems to be Goosan)
The other names: ごーさん (Goosan) or ⅤⅢ
Circle name: High & High!
Site name: まだなんにも決まってない

h4.See also

* Blog: http://53mitei.blog114.fc2.com/ 
* Pixiv account: http://www.pixiv.net/member.php?id=18342
* Nijie account: http://nijie.info/members.php?id=10415
* Twitter account (old): http://twitter.com/Gosann
* Twitter account (current): https://twitter.com/gosann53
* Twitpic account: http://twitpic.com/photos/Gosann
gosan (high&high)