Ehrye can always be found in Ko-Metru, running errands for the scholars in the great crystal Knowledge Towers. He hopes to be more someday, but Nuju believes he is too reckless to advance. Still, Ehrye has learned much from his work in Ko-Metru – will he use that knowledge, and a Great Disk, to bring down the Toa Metru and the city itself? Includes Kanoka disk Ehrye can launch.
