Villains

With every protagonist, there is an antagonist. When the antagonist takes the form of a character, this character is usually referred to as the villain. To most viewers, the villain acts primarily as a character designed to create conflict and to complicate the plot. This is true, especially as viewers become attached to the protagonist and hope for their success. However, the role of the villain serves more than these purposes; the villain is designed to better understand the protagonist of the story. Generally, the reason that the conflict between the protagonist and the villain exists is that they have opposing ideas and morals. The villain is ultimately a foil for the protagonist as they accentuate the positive qualities in the protagonist so that we as readers support their success.
Furthermore, the villain gives the reader an idea of reality as the world contains both good and bad people. Were there to be no villain, the story would be hardly anything like real life because the heroine would be able to succeed without opposition. The villain complicates the plot, but in the sense that people don't get what they want with such ease in real life.