The background/minor character you call āFine Girlā has two lines that you didnāt mention in your article. In the episode when Wyatt and Marlowe break up, four girls mistake Jonsey breaking the bad news as him breaking up with Wyatt, and the āFine gurlā Says in defence of Wyatt, āYouāre dumping him for some girl named Marlowe!ā
Also in episode where lots of girls (including Jen, Nikki, Trisha and the āFine girlā) find out they were dating the same guy and team up for revenge, the āFine girlā has a line where she says āDating your best friend!ā. Also in that episode, Jen seems quite familiar with the āFine girlā so they might have known each other.