Yeah, I was thinking along those lines, especially since her rescue was kind of a separate scene. In fact back then I thought saving her would result in somebody sending reinforcements to aid Tigre. It didn't go that far, at least not yet. I also wonder why she doesn't identify herself. Maybe she's related to one of Tigre's enemies? Or is a foreigner, fearing she would be ransomed? Although I don't know why a foreign noble lady would have been fleeing slavers in Brune. Though I suppose she could have been on her way to marry a son of Thenardier or someone else, and her retinue got waylaid.