Light Yagami's actions in the anime series "Death Note" significantly impact his sense of identity and purpose. At the beginning of the series, he is portrayed as a highly intelligent and morally upright student. However, as he gains the power to kill anyone by writing their name in the Death Note, he becomes consumed by his own sense of justice and righteousness. This newfound power distorts his perception of right and wrong, leading him to take extreme measures to achieve his goals.
As Light Yagami continues to use the Death Note to eliminate criminals and those he deems as obstacles to his vision of a perfect world, he becomes increasingly detached from his original identity. His belief in his own superiority and the righteousness of his actions lead him down a dark path, where he loses sight of his initial sense of morality and becomes consumed by his desire for power and control.
Ultimately, Light Yagami's actions not only shape his sense of identity but also redefine his purpose in life. Instead of using his intelligence for the betterment of society, he becomes a ruthless vigilante with a god complex, seeking to become the ultimate authority over life and death. This transformation highlights the destructive nature of power and the consequences of losing touch with one's own humanity.