Heroes of the North
Ajak, the Red Dancer, has hunted Cyndas across creation. His Academy exists as a subversive force throughout the East and the Scavenger Lands, and has recently started moving into Shanarinara and the North. However, he and the Academy are formidable forces, which could conceivably be a great asset in the war against Crystal.
Next to impossible, frankly, the best bet is to either get him tied up in celestial bureaucracy, or just kill him. However, it might be possible to get him to set aside his mission in order to face a greater foe. Just be careful around him if it looks like you’re about to win.