akainan
Artist.
Japanese name: 阿会喃 (Akainan, the Japanese reading for Ahuinan)
Old names: ア行の最初の阿会喃 (A-gyou no Saisho no Akainan) or 暁央 (Akio)
Circle name: Unevenness (probably the circle partner is BELLE_(tsuruta))
See also
* Pixiv account: http://www.pixiv.net/member.php?id=1265019
* Niconico account: http://www.nicovideo.jp/user/5311113
* Niconico Seiga: http://seiga.nicovideo.jp/user/illust/5311113?target=illust_all
* Twitter account: http://twitter.com/akainan877
* Circle.ms: http://c10262671.circle.ms/oc/CircleProfile.aspx
(Apparently he has some rarely-used accounts [facebook etc.] with his real-name. However they are not related to danbooru.)