Many he misses, indeed. Rosinante knows exactly who Kuai is talking about, but he doesn't call him out on it, simply smiles and nods.

"It'll be sad to see you go, but I know you have a lot waiting for you back there. You've been a big help to all of us."

Hopefully the portal will work as intended. He doesn't bring that up right away, it really doesn't feel like the right moment, but it worries him. Weaver and Will are surely going to be working on making sure everything is safe before anyone leaves, but someone is still going to have to be the first to try it. If it works, or if it doesn't, how will they know?

The best he can do is trust the people who know what they're doing, though, and trust them he does.