Artist. Has two (or more) nicknames.

* Name (contains stuff for female readers): kou
** Pixiv account: http://www.pixiv.net/member.php?id=1739491
* Name (mainly used for Touhou/KanColle yuri): 六海 (Mutsumi)
** Tumblr: http://623isana.tumblr.com/
** Twitter account: http://twitter.com/mtm_137
kouga (mutsumi)