You were the last guardsmen on the battlefield, the last man standing. More hordes of enemies made their way in, and you were left to hold off against them. But you don't just kill the last guardsmen.

Thinking your time was soon to come you were surprised when one of Emperors 10,000 showed up. Now with no more enemies within the immediate area you were stuck with a custodes.

Picked up with a light pat on your head, you were now a responsibility for him.