[Linda Cardellini] Sam's older sister Lindsay flew under the radar until recently, hanging out with the goody-goodies and fellow Mathletes like Millie. But after the death of her beloved grandmother, Lindsay is left questioning everything. Wondering what the point of being "Good" even is, Lindsay seeks out new friends... like the intriguing freaks and burnouts. Though she's as self-conscious and capable of being embarrassed as any 16 year-old girl, Lindsay is also strong-willed and smarter than most. She doesn't hesitate to stand up for herself and those she cares about, sometimes before she has time to think about the social consequences.