Throughout the series, Light Yagami handles conflicting desires and motivations by using his intelligence and strategic thinking to manipulate situations and people to achieve his goals. He often prioritizes his own sense of justice and the desire to create a utopian world over the conflicting desires of others, leading him to make morally questionable decisions in pursuit of his vision. Additionally, Light is willing to deceive and betray others in order to maintain control and stay ahead in the power dynamics at play.