Light Yagami, the protagonist of the anime "Death Note," justifies his actions as Kira by believing that he is creating a better world by eliminating criminals and preventing further crimes. He sees himself as a god-like figure who can bring justice to the world by using the power of the Death Note to rid society of evil and corruption. However, as the series progresses, his justification becomes more complex as he becomes consumed by power and his sense of justice becomes twisted.