I'm really excited that you want to play Fay/Fai however you prefer to spell his name.
I would love for you to play him. =D I believe that anyone who knows the character can pull them off. =)
Well, as for the storyline, I was thinking of just taking the main idea of searching for Sakura's feathers and see how that goes. I'm up for pretty much any sort of ideas. =) I've only read part of the manga myself, so I don't know how the anime is.
Pretty much, all you need is to get a journal for Fay and you'll have the character. =) This is the OOC community, so pretty much any sort of discussion can go here. As for the interactions between members, that'll be over at tsubasa_rpg.