Akaha
Akaha’s father was a member of a criminal society called Ryuugen who did not report the true sale of drug. Since childhood, Akaha has been fleeing with his parents, but they were caught by a higher-up of Ryuugen (called Sawaki) one day. Sawaki killed Akaha’s parents, but he spared Akaha (because he didn’t cry or beg). Since that day, Akaha lost his real name (Akaha was an alias given by Sawaki) and become Sawaki’s personal subordinate, also known as Sawaki’s right hand.
According to the police’s information, “the right hand of Ryuugen” is the No.2 leader in Ryuugen. Akaha actually held that position too.