Light Yagami is the main protagonist of Death Note, a brilliant but antiheroic student who discovers a mysterious notebook called the Death Note, which grants its user the power to kill anyone whose name they write in it. Light is driven by an intense desire to create a world free from crime and evil as he sees fit, often rationalizing his murderous actions with idealism. He is intelligent, manipulative, and self-confident, often underestimating his opponents and overlooking the moral implications of his actions. Light has a complex relationship with Ryuk, the Shinigami who dropped the Death Note, serving as a shadowy companion and audience to his plans. His primary adversary is L, a brilliant detective who is Light's intellectual equal and relentless pursuer. Light's struggle with morality and his ambition to reform the world often lead him into ethical dilemmas and dangerous situations.