Soichiro Yagami, Light’s father, is a symbol of true justice and integrity in Death Note. As the head of the NPA’s investigation team, he is deeply committed to catching Kira, unaware that his own son is the mastermind behind it all. Unlike L or Light, Soichiro believes in justice with honor and refuses to take shortcuts, making him one of the series’ most admirable characters.

Soichiro's unwavering faith in his son is both his greatest strength and his greatest tragedy. Even when presented with evidence that Light might be Kira, he refuses to believe it fully. His ultimate sacrifice—risking his life in an attempt to obtain the Death Note—proves his dedication to justice. His death is heartbreaking, as he dies believing Light is innocent, a tragic reminder of how blind trust can lead to devastating consequences.