I'll only hold it against you a little bit, [she promises, trying her very best not to laugh and beginning to fail. By the Allspark, Slipstream likes chatting with Optimus, and not for the sake of trolling him.]

Mine's a narcissic rust spot on the surface of the universe, and he ought to be buffed out and painted over with something better. Anything better. Maybe scraplets, that'd be a pleasant change. [She shrugs, with a little smile.] But after following him around for a couple days, I don't think I have much hatred to give to the rest of our kind. [It's not restraint, Optimus! It's apathy! Clearly!

It's not actually apathy. She thinks she prefers her current quiet life over the action she's seen, and wouldn't want any of her new-ish friend-like people to be upset with her when she doesn't mean for them to be.]