Castiel.
Not where I'm from - it's not exactly like that. So, it's a surprise. But how does Ruby know when a coma gal is ready to wake up and reclaim her body? And even if she does sense it, what's to say she'll forfeit it?
No, I don't trust her. You're realizing this now. I only realized it recently. Should I be telling you this? Don't really know.
I can't define 'soul' other than to know that where I'm from (which is here) without a soul you're an animalistic killer with no reigns to keep you good. Here, a soul is a big deal. Here, you can't even begin to trust someone without one. And I'm wondering how it can work differently, anywhere else.