What to Wear: Winter has what I'd describe as a "goth pilgrim" aesthetic. There's definitely a sort of Olde New England vibe to the collars and other colonial aspects of her attire, but she also wears lots of black, black nails, and dark makeup. Don't forget the white-ish hair!
How to Act: This one definitely has a weirdness about her. Act kind of unaffected and totally blasé. Make sure you nail Billie Lourd's deadpan way of speaking.