Cho/Alba - after the end (or, if you need something more specific, then Mad Max-esque I guess!)
It's not a good thing, to be small and pretty with the way society works now - not a good thing to be delicate and breakable, to be someone worth taking advantage of, and Cho's sure she wouldn't survive it without Alba (though the angel is also beautiful, she's just an intimidating kind of beauty that stops people cold in their tracks before they can attempt anything untoward).
Cho holds no illusions (not any more), knows what would become of her without her protector, and even though she's learning to defend herself, she's not foolish enough to think she could survive on her own, that she doesn't need Alba desperately as more than simply a companion; it may be love, it may just be desperation, but it's more real than anything else that Cho can lay claim to now.
The angel on her shoulder has blood on her hands, same as Cho, and when they go to sleep at night, there's nothing that feels like heaven or salvation or any sort of redemption anywhere close at hand; but they're alive, they're uninjured enough to keep moving, and the fact that there's another heart beating is comfort enough in a world where nothing is comforting any more.