Rook and Tidas are two lifelong friends who met ten years ago. How can they be lifelong friends that so recently met? The answer is simple.
The universe likes them.
The universe is an idyllic cosmic karma factory. The universe in it's infinate wisdom realized that had it let these two beings; both of whom are geniuses in their own special way, meet. They would more than likely be in prison for some foolhardy shenanigans. So, the universe let them each settle into a state of aged calmness and refinement. (Much like the best cheeses stink when aged properly)
Then ten years or so ago the other side of the lifecycle that is ying and yang reared her ugly head and they met.
Here is where it gets good...