Don't worry, Yu, Kyouya is a medical expert he can fix you up.

And by expert I mean he's never actually done surgery and whatnot before but he knows what he's doing...for the most part.

Now drink this whiskey and bite down on a rag.

BUT IN ALL SERIOUSNESS if he ever wants to or is physically capable of switching Celes will probably welcome him aboard if everyone is cool with it. If not, they can continue talking over the journals.