Damian and Djinn is pretty interesting I like the idea of the ring.
I wonder how long he will hold on to it for?
I think Damian and Djinn will be an end game sort of thing, I could see Damian breaking Djinns trust with the ring at somepoint or a villian will somehow get a hold off it (probably the villian Djinn is trying to hide from)
As to the traitor, im thinking Emiko or Crush.