Avan
I wonder what Julian is planning with Roran cause i know he has some kind of motive to switch teams and it wasnt for what Roran could offer him cause lord itza can match that
My guess is that Roran can see his high leadership porential and is willing to invest a lot into him, thus Lord Itza agreed that he would grow the most there and give them all the best chance of reclaiming earth. Sure he betrayed them in the game but they were nobodys to him and these magus from big familys are pretty cut throat by birth so its not a big surprise.