The dualities of light and dark in myths inform character arcs by representing the internal struggles and growth of heroes and villains. These opposing forces often symbolize goodness and evil, framing characters within a moral framework. As characters confront challenges linked to these themes, they embark on transformative journeys, often navigating their own flaws and redeeming qualities. This interplay fosters conflict, evokes empathy, and drives the narrative forward. Ultimately, these dualities allow for richer storytelling, as characters evolve and reveal the complexities inherent in human nature.