Pacific Void

Pacific void - The mysterious assassin division in the Rokuseigi Empire. They are low on numbers but everyone is a skilled assassin. Their job is to kill the enemy leader. They are known as the 6th division and the hidden shadows of the empire. One day the division all went to attend a SSS rated mission, except for Z3R0 who was left behind because of injuries sustained in a previous mission.The mission only the previous emperor knows what it was about. However 2 weeks after they left the emperor receive a message they completed the mission. The empire soon started to celebrate and wait for their return however up to this day no one had came back. The previous emperor died and no one knows what the mission was not even the current emperor. What happened to them?
 * This division was killed by reasons unknown.
 * Members of this division have no graves, for no one knew their names.
 * This division was thought to do mostly assassination missions, after its disbandment it is unknown which division now occupies and completes most of the assassination missions of the Rokuseigi Empire.