Kati is best friends with Isabel Coates and the two are inseparable. They often attend parties and try to secure invitations to more exclusive events.
Kati is introduced in Pilot as the best friend of Isabel Coates and fellow minion of Blair Waldorf. She and Is often match outfits and are rarely seen without the other. In Seventeen Candles, Kati's brother, Ron, allows Kati and her friends to celebrate Blair's birthday with a Japanese themed party in his apartment. In The Blair Bitch Project, Serena van der Woodsen mentions that Kati's father moved their whole family back to Israel over spring break.
In I Am Number Nine, Kati competes alongside Penelope Shafai, Jessica Leitenberg, and Charlie Rhodes to be a bridesmaid in Blair's royal wedding to Prince Louis Grimaldi. In G.G., she appears as a bridesmaid.
In High Infidelity, Blair recruits Kati and Jessica to pose a seamstress and a fan of Waldorf Designs to the WWD reporter. However, all three are shocked when Nelly Yuki is the reporter. Blair decides to send Kati and Jessica on a reconnaissance mission to see what she's up against in Poppy Lifton's collection and they're able to see, thanks to Kati's ex letting them in. They discover that the patterns are the exact same and Blair decides to take matters into her own hands. This is Kati's last appearance in the show.
- She wanted to major in neuroscience.
- Her family has a legacy of being supporters of the New York Public Library and Lincoln Center.
- She has excess hair issues.
- Her character was absent for seasons two and three due to Nan Zhang attending college.