Annoying people coming back as "someone else" always works out in the end imo
Either they act exactly like they did before and get discovered within a week or they change to the point that it really doesn't matter that people can't figure out who they "used to be" because they're at least somewhat more bearable than before
This is all assuming of course that Aeris isn't just full of stuff and isn't actually coming back at all but just wants to start a witch hunt