Serena becomes suspicious of the amount of time Dan and Blair are spending together.
Blair's secret confidant and romantic interest. [S4E19] Petty in Pink
The suspicious friend orchestrating the investigation. Serena becomes suspicious of the amount of time
The Upper East Side queen dealing with the fallout of the leaked video. [S4E19] Petty in Pink
Serena's cousin who goes undercover to spy on Dan and Blair.