Aria is one of the level 1 chumps who I send in to soak up Balog's Cry Havoc. So she should have been one-hit KO'd, but instead she retaliated and maintained her fighting pose despite the fact that she was, um, dead. Luckily I was told that I was defeated and Aria is in the crossed-out pile, along with Sifu and Phemus, so I didn't have to try and take down a barb team with a level 1, unruned Aria.
I'm guessing it's an issue that arises if Aria dies in one hit, but what do I know? Nothing. I know nothing.