My favorite character: Lindsey

A precocious child displaying a comportment far beyond her years. She never freaked out, always kept her cool, and didn't countenance any nonsense. Examples:

1) She consistently ignored Annie's incessant whining, regarding her as the vapid, contemptible husk of a human being she truly was. [Furthermore, when Annie ordered her to promise her that she wouldn't say anything about her getting herself stuck in the window, she (like the boss that she is) said nothing, and instead just turned around and headed back to the house, thereby giving herself the leeway to humiliate her in good conscience (which she immediately did once given the opportunity).]

2) She was nonplussed by Tommy's childish attempts to scare her: a) When he creeps behind the curtain and calls her name in an affected-creepy tone, she gets up and casually (not scared) inquires as to where he is. Only after he himself legitimately freaks after seeing Michael Myers out the window does she get concerned. b) While proceeding into the other room after carving the jack-o-lantern, he again attempts to scare her by saying, "He's gonna getcha!" Before even Laurie can interject, she brushes it off by retorting, "No he's not."

I'm sure there would be more such examples, but she didn't have all that much screen time.