You probably won't have much luck with that question here, the insane Ryu zealots seem to have been purged after the release of the Ryu IF (a large part of the reason Oomori wrote it).

Personally, I've got a bit of an odd stance on the matter. I would love to see them as a pair- if the series had been built to allow for it from the start. Whether it be Ryu saving him from the Minotaur or Bell's motivation simply not being to catch up to a girl in the first place. But the series as is has simply never allowed for any girl other than Ais. It's never been an option.

“How many desire Ryu as a pairing for Bell?”

A lot

Objectively the biggest ship in the serie which is to be expected from Ryuu who is a Fan favorite.

As for how desirable she is ? There is What if story where Bell end up choosing her, resulting in Liaris Freese shut down as a result of Bell's switching his target from Ais to Ryuu.

Don't we have a rule about this kind of topic on here?