Non-Japanese artist.

Nick name: CH₃ (Reading is めちるき, Mechiruki or Methyl Key, the Japanese word of "methyl group") or めち (Mechi)
Old name: けいえん (Keien)

See also

• Pixiv acccount: http://www.pixiv.net/member.php?id=221227
• Twitter account: http://twitter.com/methyl_key
• Twitpic account: http://twitpic.com/photos/methyl_key
• Private account(protected): http://twitter.com/uramettie