Although in UX ,Ventus looks like a traitor, in fact, he did not intentionally do anything wrong and did not betray his allies. And what if the Book of Prophecies had under traitors those who are not in the Era of fairy tales and not even in the Dark Road, but in the present time ? As we know in the Book of Prophecies it was mentioned that the traitor is the one who is marked with a sigil. And as we know ,Roxas, Axel and Xion were marked by it. Of course, this is nothing more than my little theory ,but given the past of the RAX trio, can they turn out to be traitors in the future or have their own plans different from those of the defenders of light.