The skeletons were wearing leather armor, and while the arrow had hit, the problem was that there was nothing behind that spot in the armor *to* really hit, or damage. This was the strength of bows, being able to slip between bones, but it wasn't serving to help her right now. If nothing else, she had at least moved to a better spot, for now.<br/><br/>(Putting Listrea directly on the space to the right of Jacob, I assume she would be smart enough to hide behind the guy with the hammer)