I really like this CR, her and Boober. I mean, I love Rosie, period, you know that. But I think it's interesting to throw together two characters who are learning to be human but in different ways. Boober is more thrown off by being taller than 20 inches or so and not having a tail, whereas Rosie clearly has some more drastic adjustments to deal with. Also, learning to cook is a great hook for CR with Boober, and music is a Fraggle's lifeblood, even a stick in the mud Fraggle like him. So I'd love that!

I also think Boober could have something to offer in terms of helping her learn to love herself? Or rather, they're both working through things like that, as Boober is currently starting to realize maybe he should accept all parts of himself, even the part that actually likes having fun and being happy. (Seriously, that aspect of his personality in canon is so repressed that it manifests in Boober's dreams as a separate Fraggle with his own name and everything.)

Finally, I'd like to very gently float the idea of Boober having a brief crush on Rosie, depending on how that CR goes? Unrequited, of course, but I've wanted him to develop interest in someone who isn't familiar to him before ending up with the ship he'll get with his canonmate Gobo, and idk it could be cute, and potentially an interesting twist for Rosie's usual falling into infatuation-- Maybe! I know even with Boober being canonly adult and being a human in the game, that might be weird, so no hard feelings if it doesn't appeal to you.