That Pearl is excessively cute. Uh. Right. I think I posted it in my character creation that Nephrite was largely disgusted with the use of the Kindergartens on Earth, and decided to defect from the Homeworld at that moment. It's entirely possible that she escaped the Homeworld on the Foot-ship. Goals aren't really all that big other than 'survive'. Like any Crystal Gem, she'd probably want to get back at the Homeworld, or at least be a part of another defense if another attack were to arrive. As for rooms? Probably a small gem powered lamp, some writing utensils, and several journals, each one containing information about various planets visited, their geographical mapping in various areas, as well as information on climate or common temperatures. There might be one journal that she writes in for personal updates. Wait, I just thought of a goal: Acquire a new ship, because a giant, flying foot is ridiculously silly.