Ramirez: You're never going to get these people to see themselves as they really are, 'cause it's the lies that we tell ourselves, they introduce us to him.
Salesman: Oh, this is not good.
Detective Bowden: Any luck with the elevator company?
Detective Markowitz: They're out of business.
Detective Bowden: I guess that figures.
Ramirez: When he's near, everything goes wrong. Toast falls jelly-side down, children hit tables, and people get hurt.
Young Woman: It feels like something bit me.
Young Woman: Turn on the lights.
Old Woman: Whores, liars, cheaters, and deserters: all in the same.
Answer: There weren't any clues. It comes off as a total surprise during the reveal. But watching it for the second time, I did notice that she spoke very less compared to others and no one was suspecting her. Usually, that kind of character ends up being the bad guy.
Earthling