In Death Note, the concept of justice is portrayed as a double-edged sword through the character Light Yagami, who believes he is serving justice by using the Death Note to eliminate criminals. However, as he takes justice into his own hands and becomes a vigilante, he also crosses moral boundaries by becoming a mass murderer himself. This illustrates how the pursuit of justice can lead to corruption and moral ambiguity, showing that what may seem like a just cause can have unintended consequences and ethical dilemmas.
