Antagonist characters are individuals in a story who oppose the main character, often creating conflict. They can be villains, rivals, or even forces of nature that challenge the protagonist's goals. The role of the antagonist is crucial, as they drive the plot forward and help to develop the protagonist's character through their interactions. These characters can take various forms, including humans, monsters, or societal issues. While they are often seen as negative figures, antagonists can also have complex motivations and backgrounds, making them more relatable. Their presence adds depth to the narrative and highlights the themes of struggle and growth.