Well... [Is that not what she was saying? (It wasn't. Not entirely. And she gets that now.) And it takes her a second too long to realize that Lapis was being funny and her laugh comes out strained and a little bit too late.

The laugh peters out when the situation doesn't become awkward and Peridot relaxes, herself. When she learned empathy from Steven, she learned it hard. She's the most at ease when the people close to her are.]

I think she has... problems being a Mirror. Even if she's real and has her own feelings and goals and everything, she's still just a reflection, and I still haven't figured out how that's supposed to work when we sort out the program. The Mirrors might just stop existing, entirely.