True. And I suppose we don't know if there's more to her backstory that could place her in any of these houses. I also think Nightingales is an unlikely place for her to arise because we've seen pictures of the creatures, and they look very, very different from the "monster" side of Lady Luck. I suppose, if anything, the raven could imply a connection to Nevermore, but I still think that's a stretch.
And I think Mary Agana is a bit different, considering Reflections was a house about her character. Are people suggesting she plays a major role in one of these houses, or just that she'll show up like The Storyteller did at the climax of Where Evil Hides?
~Blizz