In "Death Note," the theme of identity is explored through the characters of Light Yagami and L. Light's identity as Kira, the self-proclaimed god of the new world, is central to the story as he grapples with the moral implications of his actions and the consequences of wielding the Death Note. On the other hand, L's identity as the enigmatic and brilliant detective who opposes Kira raises questions about justice, morality, and the true nature of good and evil. The cat-and-mouse game between Light and L also delves into the complexities of personal identity, deception, and the lengths individuals will go to protect their sense of self.