[Luna sure is insisting on this...

(Truth be told, the other side of telling the truth would also involve admitting she's being nice. And she doesn't want to do that.)

So she decides to just...ignore the first half of this conversation and focus on Luna's lookalike issue instead.]

I didn't just meet her, she's my roommate. I thought you'd broken into my room and were waiting for me to come home or something...

It sure is unusual, though. It isn't just your appearance, but your demeanour's identical too.