Famous villainous characters often serve as the primary antagonists in stories, creating conflict and tension. Examples include Darth Vader from the Star Wars franchise, known for his dark powers and complex backstory, and Joker, the chaotic nemesis of Batman, who embodies madness and unpredictability. These characters are essential to their narratives, often highlighting the hero's qualities through their opposition. Other notable villains include Voldemort from the Harry Potter series, representing the ultimate evil, and Scar from The Lion King, who betrays his family for power. Each villain adds depth and intrigue to their respective tales.