Light Yagami, the main character in the anime "Death Note," justifies his actions as a means to an end by believing that he is creating a better world by eliminating criminals and those he deems as obstacles to his vision of a utopian society. He believes that his actions are necessary to bring about a world free of crime and corruption, where he can reign as a god-like figure enforcing justice. However, his justification becomes increasingly twisted as the series progresses, highlighting the moral complexities of his choices.