In "Death Note," morality plays a central role in exploring complex themes such as justice, ethics, and the consequences of one's actions. The characters in the series, especially Light Yagami and L, grapple with their own moral compasses as they navigate the blurred line between right and wrong in their pursuit of justice and power. The story challenges viewers to reflect on the ethical implications of using absolute power to enforce their own sense of justice, leading to thought-provoking discussions on morality and the nature of good and evil.