"Catelyn's only strength was one elderly knight, armored in loyalty."
This shows that you don't need to be surrounded by the biggest, most known people to protect you. The greatest aspect someone can have, is loyalty. You can have the most popular/strongest person to surround you, but without loyalty, he may be nothing but your downfall. But, you can also have the weakest/most lonely person to be with you and who also has the upmost loyalty towards you, you can be unstoppable. With loyalty, a person can become a true friend and would go as far as to give his own life for you. With loyalty, it doesn't matter who you are up against, you can always trust the one to your side.
This shows that you don't need to be surrounded by the biggest, most known people to protect you. The greatest aspect someone can have, is loyalty. You can have the most popular/strongest person to surround you, but without loyalty, he may be nothing but your downfall. But, you can also have the weakest/most lonely person to be with you and who also has the upmost loyalty towards you, you can be unstoppable. With loyalty, a person can become a true friend and would go as far as to give his own life for you. With loyalty, it doesn't matter who you are up against, you can always trust the one to your side.