Light Yagami, the protagonist in the anime "Death Note," manipulates the media to support Kira's actions by using his intelligence and strategic planning. Light strategically leaks information to the media in a way that portrays Kira as a hero or a force for justice. He ensures that the media coverage of Kira's actions is biased in favor of his cause, leading the public to view Kira's killings as justified and necessary for creating a better world. Additionally, Light uses his alter ego, Kira, to communicate with the media indirectly, further shaping public opinion in his favor.