Yes, Nina is still around. I don't post about her a lot, both due to embarrassment over how water-spotted and overgrown her terrarium has gotten and because she just doesn't really do that much that needs documenting -- I mean, if you've seen one Nina photo then you've pretty much seen all of them. But yes, she's still here. I also still need to replant the terrarium (possibly without the Pellionia pulchra -- I'm happy that it's done so well in there, but it might be nice to have more than one species represented, too1). Replanting is one of those things I think about every few months but never actually attempt, partly because I dread trying to catch Nina, partly because I can't decide what I want to plant in there instead.2
But in any event, Nina herself is doing fine. I think so, anyway. Not really sure what a lizard "acting out" would look like.
1 There was a Fittonia in there at one time as well, but no longer: between being eaten by crickets, rebounding poorly from the inevitable droughts, and being outcompeted by the Pellionia, it faded away to nothing some time ago.
2 I've spent a lot of time thinking about this, but never manage to come up with a plan. Most of the options are also problematic because they have the same advantages and drawbacks as Pellionia -- I have lots of material from which to start new plants, and I'm confident that they'd root, but they'd also quickly take over the terrarium, and then I'd be back in this position again.