Light Yagami, the main character in the manga and anime "Death Note," views himself as a righteous and just individual who is on a mission to rid the world of criminals and create a utopia free of evil. He sees himself as a savior of humanity, believing that his actions are justified in the pursuit of what he deems as true justice. However, his methods involve using the Death Note, a supernatural notebook that allows him to kill anyone whose name he writes in it, leading to moral ambiguity and ethical dilemmas throughout the series.
