Artist.

Nickname: スマイル幽 or "s-m!le幽" (Smile Yuu)
The other names: S-m!le (reading is given as スマイル, Smile), "smile@幽" or "s-m!le＠幽"
Circle name: クズの鑑 (Kuzu no Kagami)

See also

• Pixiv account: http://www.pixiv.net/member.php?id=501413
• Nijie account: http://nijie.info/members.php?id=89274
• Niconico account: http://www.nicovideo.jp/user/1065471
• Niconico community: http://com.nicovideo.jp/community/co2233149
• Niconico Seiga: http://seiga.nicovideo.jp/user/illust/1065471?target=illust_all
• Stickam account: http://www.stickam.jp/profile/smile813
• Twitter account: http://twitter.com/smile435
• Twipple photo images: http://p.twipple.jp/user/smile435
• Twitpic account (stopped): http://twitpic.com/photos/smile435
• Digital distribution site: DLSite.com (JP)