I really love what you have done with Atia. I also love what you have done with some of your other muses, whom I won't metion here, because I am not sure if you want everyone to know it is you writing them. (Some people are tight lipped about that, so I wanted go be sure!)

I think that if you are openly communicating with the other writers, and the communication is honest, then it should all be fine. You need to do what you feel safe doing with your characters. That is very important. I think if I had been smart, I would have been much more clear about what was canon, what was RP, what was meta, etc. Because it seems as if so many different people have different versions as to what is what as far as defninitions go. Maybe if that were consistent across the board with all players, it may make it a bit easier.