If you enter 7 and she's up (i.e., on track), she and her pet will be buffed to high heaven and harder to kill.
If she's not up, she'll pop from the death of a (lower level) bat (cons green or low blue to a 51 -- thanks Ithiss from Brell for this info) and won't be buffed. FYI, the placeholder
From what I have seen, there is a chance that see invis fish may or may not spawn in that area. If they are up, they have a very wide agro radius and ...