She is portrayed by Nicole Fiscella.
Novel Series Edit
Not much is revealed about Isabel, other than she is Kati Farkas' best friend and that the two do everything together.
Television Series Edit
Isabel appears in the Pilot, noting that someone saw Serena van der Woodsen get off a train at Grand Central Terminal. She appears throughout the rest of the season alongside the other girls,Kati Farkas, Penelope Shafai, Hazel Williams, Nelly Yuki, and Jenny Humphrey.
Throughout the second season, Isabel appears with the other girls; namely Penelope, Hazel, and Nelly. In It's a Wonderful Lie, she buys a dress to wear to the Snowflake Ball that ends up being see through. She then gives it to Jenny to humiliate Vanessa Abrams with. In the season finale The Goodbye Gossip Girl, Isabel graduates alongside everyone else and helps the other girls almost crown Emma Boardman the new queen.
- She is a concert pianist.
- She never wears the same outfit twice.
- She once broke her arm at a ski spa resort.