Aaron Rose

An artist Serena met at Rufus' art gallery. He has recently met Serena at summer camp in Europe many years ago, were somewhat "married" and moved on. He reminded Serena that they have met before by asking the fate of Cecil, the Caterpillar. Aaron is somewhat of a romantic and impresses Serena by taking pictures of her, renting a billboard in Times Square to "introduce his favorite his places to her.", but Serena distances herself from him when she discovers that he likes dating multiple women at once. Aaron eventually steps up and makes his relationship with Serena exclusive. When Aaron discovers Serena's colorful past but accepts it when he tells her that he's a recovering alcoholic. He's Cyrus' son and Blair's stepbrother. After going to Buenos Aires for Christmas with Serena, the two end their relationship because of Serena's residual feelings for Dan.