Penelope Shafai

A member of Blair's clique until she was dethroned as queen bee; constantly shifts her allegiance between Blair and Jenny, helps host Jenny's party and gives the freshman the benefit of the doubt when she lied about having sex with Asher Hornsby in 'All About My Brother', eventually ends her friendship with her. She is also a national Merit Scholar. Chuck persuades her to ruin Amanda Lasher's hair which ends up in a fight between Dan and Serena. Penelope is also notable for officially "dethroning" Blair in season 1.