An author sometimes uses a foil character to contrast the protagonist of a story in a way that emphasizes their characteristics. In The Most Dangerous Game (reprinted in Laurence Perrine and Thomas R. Arp, Literature: Structure, Sound, and Sense, 6th ed. [Fort Worth: Harcourt, 1993]), General Zaroff acted as a foil for Rainsford in the way that he contrasted Rainsford, by making him the hunted instead of the hunter. Rainsford was a hunter by nature. He enjoyed hunting and was always on a quest for new game. In the beginning of the story, ....