Light Yagami's actions, particularly his descent into moral ambiguity and obsession with power, have a profound impact on the psychological well-being of those around him. Those close to him, such as family members and friends, may experience intense emotional distress, confusion, and fear as they witness his transformation. Additionally, individuals who come into contact with Light, either as potential allies or enemies, may suffer from increased anxiety, paranoia, and mistrust due to his manipulative and deceitful nature. Overall, Light Yagami's actions can have a destabilizing effect on the mental health of those in his vicinity, leading to a heightened sense of unease and vulnerability.