Artist. On her/his pixiv profile page, this artist wrote her/his opinion about re-uploading her/his images.

Japanese name: 藤代 ゆう (Fujishiro Yuu)
Old name: 藤原 ゆうき (Fujiwara Yuuki) or "ｆ"

See also

• Pixiv account: http://www.pixiv.net/member.php?id=88397
• Drawr account (empty): http://drawr.net/hitokage
• Twitter account: http://twitter.com/_fujiyuu_