Image is from pixiv.
http://www. pixiv.net/member_illust.php?mode=medium&illust_id=50386592
Images 38 & 39 out of the set.
Spent a while looking for character/ip name using tags on different sites but couldn't find it which is why I'm here.
>>14051837
She has the same hairstyle & ornament as Honoka from Dead or Alive, but a different eye color. It's most likely another character cosplaying as her, but I'm not sure which one. Sorry I wasn't of much help
>>14052086
It's still one step closer than I was, so thanks for the help.