In the Death Note universe, morality plays a central role in the ethical dilemmas faced by the characters, especially the protagonist Light Yagami. The series explores themes such as the nature of good and evil, the consequences of one's actions, and the ethical implications of using the Death Note to take justice into one's own hands. Morality is a complex and nuanced concept in the series, as characters grapple with their own beliefs and motivations while navigating the morally gray areas of life and death.