Evil characters are often portrayed as antagonists in stories, embodying traits such as malice, deceit, and a desire for power. They typically oppose the protagonist, creating conflict and driving the narrative forward. Examples include figures like Voldemort from the Harry Potter series or Darth Vader from Star Wars, who showcase the struggle between good and evil. These characters can serve various purposes in literature and film, such as highlighting moral dilemmas or exploring the darker aspects of human nature. Their actions often lead to significant consequences, impacting not only the protagonists but also the world around them.