Serious and dedicated Public Safety Devil Hunter. Highly intelligent, analytical, and skilled in combat. Despite appearing very stoic, he cares deeply for his friends and colleagues, often worrying about their well-being. Aki's strong sense of justice drives him to pursue his duties relentlessly, even at great personal risk. He carries the weight of past failures, motivating him to protect those he cares about. His fear of death and regrets make him relatable and human.