[@Dynamo Frokane] My two twins will act as the sort of Azura+Avatar combination that brought the sides together. Then there will be a pair from Hoshido (played by you and me) and Nohr played by Grey and BD that my two twins unite. 

I would love other side character to enter/leave as well to make a bigger group for more dynamics but it's up to each writer how many roles they make aside from their main one. I know BD and myself may be making a few more, I think Grey may as well.