" The Sakia brothers were soldiers who were a part of the magic using bands fighting with the outer regions against the capital. The channeling of the nether was restricted to only these warriors and many of those who had previous experience in this were enlisted in their ranks, wilful or not. Therefore if one was not wearing the uniform of these soldiers, they would essentially be considered outlaws. They would always work in groups of three and several of these groups would be present in each battle, as their presence was necessary to battle against those who have become wholly consumed by the nether.
The reason for the group size was to allow them to remain mobile and to be able to slay one of their group members if they would be lost to the nether due to constant exposure. Groups would be formed with the principle of one senior member and two juniors."