Light Yagami is the protagonist of the anime series Death Note. He is a highly intelligent high school student who discovers the Death Note, a mysterious notebook that allows him to kill anyone by writing their name while picturing their face. Driven by a sense of justice, Light adopts the alias 'Kira' and sets out to create a utopian world free of crime. However, his methods become increasingly ruthless, leading to a cat-and-mouse game with the brilliant detective L, who seeks to stop him. Light's character explores themes of morality, power, and corruption.