In Death Note, the theme of the struggle between righteousness and self-interest is portrayed through the character Light Yagami. Light initially believes he is using the Death Note for the greater good to rid the world of criminals and create a utopia. However, as the series progresses, it becomes clear that Light's actions are driven more by his own ego and desire for power rather than a genuine sense of justice. This internal conflict between his self-interest and his perceived righteousness ultimately leads to his downfall. The series also explores how the pursuit of one's own self-interest can corrupt even the most well-intentioned individuals.
