Charxai has already left the exiled, and confronted Zixan about the ultimatum. Ten days has passed, and Zixan sticks to his guns. Charxai isn’t alone, however, a keyblader is with him. The motive, drive, and history of the keyblader are undecided at this point. Instead of Zixan going himself, he sends a strike team to both retrieve Charxai and defeat the keyblader. The strike team runs into trouble, and Zixan goes himself. (Scene of Charxai greeting Zixan sitting at a table with hot tea :]) Xannoh is sent in the strike team, and killed by the keyblader. This is supposed to bring Charxai out of his leave and bring him back into the exiled.
Scene of Salix sending Xishn out to find Charxai, undecided how he got the location; maybe Salix gets an idea through his incredibly honed senses. Xishn passes out in the wasteland, Charxai rescues and brings back to Salix. Actually, Charxai leaves Xishn in Salix’s room, not detected while at the Exiled base.
Charxai hides himself in a very secure location, and one that’s very hard to reach. In the middle of a wasteland, probably in a mountain of some sort, would take quite a while to reach on foot, not to mention that the trek is tiring.
Thinking maybe that Xannoh is sent to Charxai’s world to confront a keyblader (unrelated) whilst Zixan goes to confront Charxai. Two hidden nobodies convey to Zixan that Xannoh is in trouble. Charxai goes, Xannoh dies, blah blah blah.