NAKAHARA CHUUYA
On the surface, Chuuya is a temperamental and rather arrogant, blunt man. He revels in fighting, happy to show off his combative ability and taking great pride in his reputation as the mafia's strongest martial artist.
For as hot-headed as he may seem, Chuuya isn't impossible to reason with. In fact, he's rather reasonable when no one is pushing his buttons.
汝、陰鬱なる汚濁の許容よ、 Oh, Grantors of Dark Disgrace,更めてわれを目覚ますことなかれ Do Not Wake Me Again.
Ojoku is the true form of Chuuya's ability and is exceedingly dangerous. This ability allows him to manipulate the gravitons in his surroundings. By increasing his own density, he is capable of crushing a tank with his bare hands. He is also able to shoot balls of compressed gravity that act as black holes that swallow anything. However, he has no control over his Ability's true form; he will continue in that state if his Ability is not nullified until he dies.
leave it to me, partner.
Chuuya's ultimate downfall are his intense feelings for Dazai. As he's the only one with the ability of nullify Chuuya's corruption, the petite gives him his heart and soul.