Karlan was a crusader of the second order.
A great accomplishment for someone his age, especially with how he joined the ranks at the mature age of eighteen years old.
Contrary to those luckers who were born into the cause or joined young, he couldn't use his years of service to advance. He didn't groom any beneficial friendships that would ease his path to his rank either.
No.
For Karlan, reaching the second order was an accomplishment he reached by shedding more sweat during training than his peers and more blood than his fellow crusaders.
Tens if not hundreds of scars on his body bore the mark of all the hardships he had to overcome to reach his current standing. And because of those factors, when he achieved his dream of advancing to the second order, he was one of the rare elites within.