Soichiro Mikuni is the antagonist of the C - Control anime. Though he owns three Assets, he seems to enjoy taking Q on 'dates'.
When Mikuni was younger, he was a member of a band but, as if fate had conspired against him, his band split up just before they signed a label. Then, through a seemingly random yet unfortunate series of events, he felt he was left
with no other choice than to work for his father's company, but only after his younger sister, Takako, was left comatose due to circumstances outside his control. Masakaki then appeared to him, with a proposition to join the Financial District. Mikuni accepted and is currently head of the Starling Guild and has three assets: Q, Kakazuzu, and Aurora.
At the start of the anime Mikuni is very powerful within the District, his ideology seems justifiable, as the show continues his motives become clearly selfish.
His strength in battle is inexplicably powerful and precise throughout the anime.
C - Control
When the anime begins, Mikuni is considered the strongest Entre in the District. He is also one of the most powerful businessmen in Japan, able to pay for the government's debt and buyout large companies before they collapse. When he meets Yoga Kimimaro, protagonist, Mikuni decides to help him.
He regards Yoga as a side hobby and only indicates that he is interested to see Yoga's progress in the district.
As the series continues Mikuni reveals his intention is to manipulate the District into aiding the people of Japan and the world.
Due to Mikuni's insistence on using Midas money, and the Midas printing press, to correct problems in the real world, the future of Japan is rapidly taken by the Midas Bank, affecting the global economic climate harshly.
Near the show's climactic finale Soichiro insists on repeated use of the Darkness Card, which allows its wielder to print enormous amounts of money at great expense of future, to preserve the present. But more important to him is preserving the life of his still comatose little sister.
At odds, Mikuni and Q battle Yoga and Mashu in a climactic Deal. Mikuni surrenders once Takako reaches out to him through his Asset Q. It is left unclear what became of him after the future is given back to the world.