The massive property damage was perhaps a bit of play up, but when the group play, it seems that the best way to keep the monsters down for good is to collapse the dungeon with bombs, regardless of who owns it. She's only left one crater, one large pond that was formerly one of the other PC's parents properties with a rotting castle in the hill beneath it and a broken prison.
And she may have been more neutral, but she has attempted to at least pay for some of the damage caused, including a riot she helped incite, if only by virtue of being with the people who actually started it. And I am playing up the mutegen Jekyll/Hyde bit for whenever she becomes the monster, as she's starting to enjoy the rage and sheer power that comes with it. So maybe the lawful will make it harder to go with that, but it's her last line of defense most the time anyways.
And thanks for the advice so far.
Oh, as for the atheist, agnostic bit, she and her family are more focused on the whole, FOR SCIENCE! (Or alchemy) then actual gods. There is a godling/avatar/something in the group too, but she just looks at him askance most the time.