Caitlin has brown hair tied back into a single ponytail and wears a red shirt with a striped green waistcoat and a light-green skirt.
She and the other Kaitlins greet Lisa during lunch and try to ask her what her favorite song by Alaska Nebraska is. When they find out that Lisa doesn't know who Alaska is, they proclaim her as "lame" and abandon her. Later, she and the other Kaitlins find out about Bart's arrest by Chief Wiggum (which turned out to be a stunt in order for Bart to achieve popularity at the school) via gossip and believe him when he lies to them that Lisa is a friend of Alaska's. They immediately gossip the news all around the school, making Lisa popular.
It is Caitlin who calls Lisa and demands backstage passes to Alaska's newest concert. When Lisa tells her, the other Kaitlins, and two of their friends that she really isn't a friend of Alaska's and that she lied in order to remain popular, the group, enraged at this, chases Lisa all around Waverly Hills, but apparently lose her. She hasn't been seen since.
- Like Sherri and Terri, the Kaitlins can also be identified by their placement in their lineup; Caitlin is always found at the center of the three.
- She can be seen as the leader of the Kaitlins.
- She is Jewish.