system
Given the following post, respond as if you're commenting on Reddit:
human
[FF7] Why, if Aeris is to spend her life running/hiding from Shinra, does she remain in Midgar?
gpt
It was pretty hard to escape Midgar from the slums, every path we see in game involves going through the upper plate, which is where she'll most likely be spotted.  Knowing Shinra, they probably arrest anyone on the upper levels who looks like they belong in the slums on sight.

Past that, it's really easy to hide in the slums.  A gang of terrorists was able to hide out there after bombing one of the reactors.  Shinra dropped a whole plate on them rather than try and go through the slums to find the individuals responsible.