Some thoughts:
Vera:
Probably gets along really well with
BB, who is also a progressive artiste but in different enough fields (music and performance art) that their pretension won't rub each other the wrong way.
Juliette is probably acquainted with Vera, maybe they've crossed paths in debate or adjacent circles. Juliette is also super interested in politics, but somewhat inscrutable when it comes to her personal stances; she does to some degree mirror people she's around. She gets along with most folks, though, so possibly acquaintances on decent terms.
Sofia has like one thing in common with Vera, and it's guns, so Vera may not be especially keen on that as point of connection. Probably doesn't love Vera's holier-than-thou attitude either, maybe some light mutual scorn here?
Bruce:
BB maybe digs having him in a group because he's easy prey for jokes and isn't gonna question her being very clever indeed. That said, he's wiser in the ways of weed than her, maybe they've smoked together once or twice and the dynamic was different.
Juliette is kind and polite to Bruce but privately thinks he's an idiot and tries not to spend unnecessary time around him.
Sofia's a potential friend; his style of weird antics aren't really the same as hers, but she can respect them and shares his small-town vibes a bit.
Keith:
BB's not gonna be, like, cruel to him but she's probably not gonna do him any favors on the practice talking to girls front either. When it comes to music, she's probably not interested unless he's pretty good or pretty weird, and it doesn't sound like he is.
Juliette sees him as another face in the hall, maybe catches secondhand cringe off of him but if he's not making her life difficult her stance is neutral, which for her means she's very nice to him and probably a lot more patient than other people are.
Sofia hates bullies. She probably doesn't especially care about Keith himself but she'll tell people messing with him to knock it off if she sees that going on because she doesn't like folks messing with people.
).