Erik the Slayer is a mercenary based in Rorikstead. He used to be a cabbage farmer until Cock Nibbler forced Erik's father, Mralki, to let go of his child. He can be seen in his father's inn, Frostfruit Inn.
Cock Nibbler has taken a liking to him ever since he changed his named to "Erik the Slayer." (Probably would not have been impressed with "Erik the Hoe Pusher").
Cock trains him in the art of sneaking (The Spy Who Bugged Me) and fighting. Unfortunately, Erik disappears during many of the action heavy lessons, such as when sneaking in and assassinating a blacksmith (The Real Slim Nibbler) and any of the heroic battles (Nekkid Cave People, The Spy Who Bugged Me, The Cook Did It).