I would say work ethic because that shows how much they’re willing to work for something and it really reveals their character. If they have low work ethic they probably don’t/won’t do anything and that’s not someone you want to be around.
"In the bottom" is the prepositional pharse
Answer:
She means, there are secrets at work, conspiracies and plots among those townsfolk who are in league with the Devil and who do his work for him
Im sure the answer is Banquos ghost