Light Yagami's actions, particularly his use of the Death Note to eliminate criminals and shape the world as he sees fit, have a profound impact on his sense of identity and purpose throughout the series "Death Note." Initially, Light is depicted as a highly intelligent and morally upright individual who believes he is serving justice by using the Death Note to rid the world of criminals. However, as he becomes more consumed by power and the idea of becoming a god-like figure known as "Kira," his sense of identity becomes increasingly intertwined with this new persona.
As Light's actions escalate and he engages in more morally questionable decisions to achieve his goals, such as manipulating and killing innocent people, his sense of self becomes more distorted. He becomes arrogant, narcissistic, and detached from his original values and beliefs. This transformation ultimately leads him to view himself as a supreme being who is above the law and morality, causing him to lose touch with his own humanity.
In terms of purpose, Light initially believes that his actions are driven by a desire to create a better world free of crime and injustice. However, as his obsession with power and control grows, his sense of purpose becomes more focused on maintaining his own authority and eliminating anyone who opposes him. This shift in purpose ultimately leads to his downfall as he becomes consumed by his own hubris and loses sight of his original intentions.
Overall, Light Yagami's actions have a profound impact on his sense of identity and purpose, transforming him from a well-intentioned individual into a morally corrupt and power-hungry villain.