onion_(s00234289)
Artist.
Nickname: ONion
Old names: "GrLic", 落胆ティウス (Rakutan-tius) or アリジゴク (Arijigoku)
See also
* Pixiv account: http://www.pixiv.net/member.php?id=3033213
* Niconico account: http://www.nicovideo.jp/user/9160709
* Niconico Seiga: http://seiga.nicovideo.jp/user/illust/9160709
* Twitter account: http://twitter.com/ONion344