Jill Green is Rachel's youngest sister. Jill comes to the apartment looking for Rachel (the only daughter their father is proud of) and attempts to start a new life, as Rachel did. Jill ends up breaking the rules (shopping to excess thanks to her having memorized her father's credit card numbers) and dates Ross to spite Rachel. However, Ross ended the relationship before it could really start after realizing that, if something happened between him and Jill, nothing could ever happen between him and Rachel; although he didn't know whether or not he and Rachel would ever get back together, he didn't want to know that they never could. This caused Jill to leave, as she didn't want to stay around with someone who sabotaged her every move, bitingly asking Ross if he was gay (based on his reject