Aaron Rose is a character in Gossip Girl. The character is portrayed by John Patrick Amedori in the television series of the same name. He is the son of lawyer Cyrus Rose, who goes on to marry Eleanor Waldorf by that Aaron is the step-brother of Blair Waldorf.
Aaron is a sixteen-year-old graduating senior from Bronxdale Prep in You Know You Love Me. He has his license and skipped 10th grade. He is described as having "a head full of short brown dreadlocks to a boy Blair's age with big brown eyes, pale skin and red lips that curved up in the corners." It is revealed that he has a crush on Blair, but he couldn't tell her because they are step-siblings. Later he gives up after seeing her with Nate, and he dates Serena for two weeks.
Aaron, first appeared in Pret-a-Poor-J as the upcoming artist Rufus Humphrey found. We can see as he puts up an art installation he meets Serena van der Woodsen. It is revealed that Aaron and Serena met at camp years ago when they were children. At the time they got 'married' with licorice rings but Aaron broke up with Serena due to her eating her ring. They begin to see each other, but unbeknownst to Serena, Aaron is also 'dating' other girls. Aaron, finally decides to be with just with Serena But this creates a rift between Dan and Serena.
In the end, they break up on the way to Buenos Aires for the holidays. Many viewers of the show disliked Aaron and their relationship. His father married Blair Waldorfs mother. We know Aaron is Jewish.