Fred is a very skilled and talented man...He is able to utilize and fight with several different types of weapons, not to mention his ability to create disguises...He prefers to follow orders without having to interact with people...

You see through him, he's supposed to be trailing you, yet no matter what disguise he uses you know it's him...You don't flinch when he points a weapon at you...You seem excited to have some company...He wonders if there's a reason William had him follow you...