Caitlin Cooke is a slightly peppy and resourceful girl with a love for shopping. She is employed in the Galleria Mall at the Big Squeeze lemonade stand, a job which she received out of pity from Jen Masterson.
Caitlin comes from an upper-class background, born to wealthy parents; her father is an attorney. In the episode Take this Job and Squeeze It, she is introduced as a spoiled child along with her snobbish to-be-ex-best friend, Tricia. Unaware that credit cards have limits, Caitlin consults her father when she fails to make a payment, prompting him to point her in the direction of employment to teach her the value of the dollar. She is the only main character of 6teen that was not already a part of the program's focal circle of friends at the beginning of the series, a position worsened by her infighting with Nikki, though she was quickly admitted to their ranks regardless.
Caitlin has had many boyfriends, and her relationships do not usually last beyond one episode. Notable crushes include Kyle Donaldson, a promiscuous tennis player who she scared off during a date by vomiting on him, and Talon, a boy she continuously injured unintentionally (even slamming a car door into his "kiwis") but gave up on because he was a lousy kisser. In Waiting to Ex-Sale, she forms and ends a relationship with Tad while waiting in a line outside the Albatross & Finch clothing outlet. In addition, she has quarreled with Nikki and Tricia over two other boys, and has pretended to be a college student to impress an undergraduate. She may have a crush on Jude who she has flirted with a lot, hugged a few times and even kissed him twice on the cheek.
Caitlin is employed in the Galleria Mall at The Big Squeeze lemonade stand, a job which she received out of pity from Jen. Initially, her commitment to her job was mediocre and her drinks were lousy, but she developed a stronger work ethic over time. She has left the Big Squeeze twice, once after she successfully paid off her credit card debt, and again to start employment in the Chocoholics Anonymous confectionery shop. In the first case, she temporarily relinquished her duties to her doppelgänger, Katie. At some point in her life, Caitlin wanted to be an actress in soap opera.
Caitlin has been involved in more criminal offenses than any other character on 6teen. She was once framed for shoplifting by Tricia, leading to her repetitive arrest by mall security, and also played a role in a stalking incident, in which she was arrested by local authorities for pestering a boy she was infatuated with and violating a restraining order. She was caught with a Fake ID in It's Always Courtney, Courtney, Courtney!