In the anime "Death Note," Light Yagami uses manipulation of the legal system as a crucial element in his plans to become the god-like figure known as Kira. By exploiting his knowledge of law enforcement procedures and using the Death Note to orchestrate deaths of criminals, Light manipulates the legal system to create a world where he can act as judge, jury, and executioner. This manipulation allows him to maintain a facade of justice while ultimately seeking to establish his own sense of absolute power and control.