Roxy for appearance headcanon, Steven for aging headcanon, and Pearl and Lapis for happy headcanon.
Roxy: I have a lot of headcanons for her, honestly. I’ve never settled on an ethnicity for her, but when it comes to her hair I love the idea of it being perpetually in classic 50′s curls and/or having pink streaks in it. I think her makeup would be constantly flawless somehow, because it’d be a hobby of hers and she would have had plenty of time to perfect it. I imagine her body type to be pretty similar to mine, except with slightly wider hips, and she’d be about 5′6″. Oh, and I think her face shape would be pretty angular, like how you’d imagine a pixie to look.
Steven: He’d age pretty slowly, I think. Once he got the hang of it, he’d be able to control his aging, although it’d still happen. Maybe at half the speed of a regular human. He’d age faster after Greg dies, though, and even faster after Connie dies, since his outward age is relative to his mental state. The Gems would take good care of him once he got really old.
Pearl: When Pearl is happy she talks really excitedly and it’s kind of infectious. If she’s ever happy around humans who aren’t used to her, they’ll often find themselves smiling or talking faster without even realizing it.
Lapis: A happy Lapis would dance, whether it’s a restrained hopping from foot to foot or an outright ecstatic twirl. She’d be the kind of person (er, gem) to pick you up and spin you around if she hadn’t seen you in a long time or if you’d delivered really good news.
