>>67793335Honestly, I don't know. Part of the reason that crossover fic has been a pipe dream for so long is that I don't have a good answer. I remember last time this conversation came around there was this idea of having chuubas who have reincarnated as Masters, eg. Kson as a Master. Which I kinda like because you could have someone like Coco be a Servant who thus comes into conflict with Kson and her Servant.
Otherwise, you'd have to do Chuuba/Chuuba pairings which is fine but does strike me as a bit of wasted potential/a conundrum but it would be easier to have your Rin analog that way.
I guess it boils down to how closely you want to follow Fate Say/Night or even Fate/Extra. Like is the battle royal a virtual idol tournament or a urban fantasy thing? What are they fighting for? And so on. I think figuring that out first would give you the answer to "Who are the Masters"
Obviously, it'd be a lot of work lol