[He leans back in his chair. And gives Rei a calm but sure look, speaking soft but not at all disingenuous.]

But I want one thing to be straight here. And I want to make it clear without any fighting or hard feelings: I know Castiel, too. I know what he's like; we've been through a hell of a lot together, just like you and he have. Some things you know, some things you don't. He's one of the only friends I've got left.

Don't lecture me on what to remember about him, and I'll do the same for you.

I think we both deserve that much.