That knight uniform looks so cool and you know you love a knight girl wielding sword. That white uniform adds the elegance of her appearance. I think this is an original artwork since I don’t really know where this character come from.
Randomness Thing
Because something is worth sharing with
Randomness Thing 
Can you post where you got this artwork from? Really interested in seeing other works from this artist!
http://www.pixiv.net/member_illust.php?mode=medium&illust_id=57932956