Aurora would appreciate how calm and quiet Belle is- she wouldn't freak her out by being hyper or outgoing. she'd make her feel at ease. Belle would like Aurora's calmness and manners and find her story very interesting, as it's a classic fairy tale. They'd have mature conversations together and maybe be close friends. Aurora would help Belle learn how to spark her imagination on her own without books and Belle would be understanding of her desire to be treated better.