This is our friend the nameless paladin doing what paladins do best: smiting. If she looks a little strange it is most likely because her shin is too short. I tried to compensate for it by pushing her heel down, but I think it was too late to save without a significant restructureing of her posture or the demon's position, so it stayed. That means the demon used his infernal magic to give her a retroactive birth defect, and her magic armor resized to fit. Don't worry. It'll wear off with time.