Yuuya Mirokuji

The main antagonist of the "Exclusive Underground - Dark Night" manga. He is a violent person who enjoys picking fights, though he is shown to have a more calm and laid-back side. He fights using a bokken and can summon a spirit called Hangaku to fight by his side. He is not interested in making his creator alter his world, being fine with the way he is. Though he remains independent at first, he came to the aid of Souta's group against Altair's faction several times and eventually joins them.