[Dammit, Nick. Why you gotta be like that. Rey balks a moment, before she recovers again:]

You haven't seen what all she's capable of. She doesn't try to hurt you directly -- she'll do that in other ways. Killing her? Shit, that's probably what she wanted from you.

[Not even Rey can say she understands IV entirely, but she's spent enough time observing and doing her own thing to have a pretty damned educated opinion.]