荒井 昌義

One of the directors of the Sonoda Zaibatsu.

He is Mao's father, but his daughter does not love him because of his laissez-faire upbringing.

He is a drifter from a high-ranking career bureaucrat group, and is an ambitious man who finds meaning in life and passion in getting ahead in the world.

When "Sonoda Koichiro" falls into a critical condition, he joins the fight for succession.
He sees Akira, who is also a candidate for succession, as a rival, and plans to subjugate Akira by demonstrating his power.