Akui possessed a laid-back personality, confident that as a demon, most things would naturally go his way. Yet, he took his job very seriously. Before joining the team, he was known for his arrogance and bitterness. He led his army with a cold detachment, hardly caring about the lives of his soldiers. Their deaths were merely annoyances to him, obstacles to be overcome in his relentless pursuit of power. However, his defeat marked a turning point. In the quiet aftermath, Akui reflected on his past actions—the countless lives lost because of his arrogance, the emptiness that had permeated his existence. He realised that despite his power and position, he had found no joy in life, only a gaping void that nothing had filled.

At present, Akui is the detective of a police department. He takes night shifts and wants to take the lives of others (evil people) the right way.