Artist.

Name as a blogger: そこはか (Sokohaka)
The other names: sophian (そふぃあん) or  沙羅双樹 (Sarah Sauge, danbooru romanization: Sara Souju)
Site name: うたかたの日々 

h4.See also

* Blog: http://utakatadays.blogspot.com/
* Pixiv profile: http://www.pixiv.net/member.php?id=477215
* Yahoo! Auction account: http://openuser.auctions.yahoo.co.jp/jp/user/sarah_sauge 
sarah sauge