The characters' moral dilemmas add depth to the plot by creating a layer of complexity and authenticity to their motivations and decisions. These dilemmas often present internal conflicts that force the characters to confront their values, beliefs, and principles, leading to a deeper exploration of their personalities and the themes of the story. As the characters navigate these ethical challenges, they are pushed to evolve and grow, making their journey more engaging and relatable for the audience. Ultimately, these moral dilemmas contribute to a richer and more nuanced narrative that resonates with readers or viewers on a profound level.