koyoi_(ruka)
Artist. Formerly tagged as koyoi.
Japanese name: 杞宵 (Koyoi)
See also
* Pixiv account: http://www.pixiv.net/member.php?id=745760
* Niconico account: http://www.nicovideo.jp/user/1713597
* Niconico community: http://com.nicovideo.jp/community/co1418977
* Niconico Seiga: http://seiga.nicovideo.jp/user/illust/1713597?target=illust_all
* Twitter account: http://twitter.com/coyoyoi
* Old twitter account: http://twitter.com/coyoimo
* Twitpic account: http://twitpic.com/photos/coyoimo