Rolf is an immigrant from a far and distant culture known to us only as The Old Country. The most evidence was shown in "No Speak Da Ed." There, it was revealed that he is familiar with a trickster named Gerta who lives in Norway. During flashbacks in that episode, he is seen being chased by what appears to be someone in a wolf costume. Rolf works on his parents' small farm within the Cul-de-Sac and leads a scouting group called the Urban Rangers; a Boy Scout-like group consisting of Jimmy, Plank, and Jonny. Rolf often refers to himself in third person, as well as being the "son of a shepherd," in which he takes great pride. He hardly minds the Eds unless they make a fool out of him or insult his culture, after which he is not afraid to use brute force. When his superhuman strength is unleashed, it rivals Ed's; however, it should be considered that he is the second strongest character in the show, since he was seen lifting a tree with difficulty while Ed can lift a house single handed. Regardless, Rolf's strength depends on his mood rather than his biology.