So there’s two ways to go with a question like this. One way is to find Studio members similar to characters Shinso befriended in canon (like the ones he listed here), who’d be more outgoing, friendly type. For this Ask, at least, I decided to go the other way and try to find someone who more closely matched his energy. I’m sure there’s a few options, but Choso is who immediately came to mind for me. I think they look good together, anyway.