Oh? Another member of the True Organization with thoughts of treachery? Boy, Xehanort sure does know how to pick em, huh?
Even if we knew now, I doubt we'd fully understand the importance and/or relevance of it anyway. Same with Demyx, and we still don't even know why Nomura decided to put Ven, Marluxia, and Larxene in Union Cross either.
Also, this comment made laugh, because how many times do we have to ask who A or B "really is" before things finally become consistent again? We didn't need any of that to fall in love with the current cast, so why does it feel like the writers think it's a necessity to inject this sort of twist? Personally, I'd get burned out from reusing the same concepts over and over again, but that's just me.