She looks really cutie in this. It would be sad if she actually had to fight in a war thought. She's not the kind of pony who whould kill others to protect her home. Even when they have done something to threaten Equestria.
Definitely my favorite of the five. I like pretty much everything about the design. I always find it a bit odd when the MLP characters have those mouth muzzle whatchyacallits on, but they are horses after all, and horses are known to have those. I guess that's just one of those quirks of anthropomorphism. =o
Anyway, love the design of the armor, love the way you drew her, totes faved.