Light Yagami's actions in the anime "Death Note" lead to significant consequences for those around him. His manipulation, deceit, and disregard for human life result in deep psychological effects on those who interact with him. Many characters experience fear, paranoia, guilt, and inner turmoil as they grapple with the moral dilemmas brought about by Light's actions. Additionally, the constant pressure of being involved in his schemes takes a toll on the mental health of those around him, leading to a sense of helplessness and despair. Ultimately, Light Yagami's actions contribute to a dark and unsettling atmosphere that affects the mental states of those in his orbit.