She'll talk to Lee, I think, because he's all lighthearted and non-serious and she's totally on board for that. And I'm not sure how she'd react to teasing, but I wouldn't mind finding out.
I think Barney is the kind of person that makes Ruby think she doesn't understand people at all. Like, she doesn't dislike him, she just... feels like a completely different species than him
And yay Mel! Ruby loves her too, a lot. And I agree re: interaction. We already know the basics, so we just need to see how things actually happen when we put them together. I'm excited!