Gwyn is the only one on this list who I am not super duper familiar with, but I think she and Lucy might get along really well based on what I read in your app for her.
I am rally very sorry that I am maxed out already because I would love to write Finn against your Rey tbh but I do not have the space 😢 If that ever changes and he is still available, I will consider it, but in the meantime I am excited to write Jacen with her and all the fun of the different timelines. I also will throw Ezra at her because he is also a bb Jedi and they are close in age. They also have the shared experience of basically being orphaned by the Emperor and having to grow up figuring out survival and all of that. So I think that could be a really fun line to explore.
I have no cast mates for Eliot, again because I lack self control and am already at the character limit. But I love him and I will throw people at him. I think he and Katie, in particular, will get along pretty well.
For Charlie, I have Katie and Gideon as cast mates. Katie remembers him from school, although obviously he was a fair bit ahead of her! But she’s also mates with George and Ron and Ginny so I expect he at least knows her as a friend of his younger siblings. And of course Gideon is his uncle and that’s going to be fun to play out. I also LOL at this PB choice because I legit use the same face for George when I play him haha
Aside from the above, I am happy to throw any of mine at any of yours for random shenanigans.