Hajime Kokonoi

Hajime Kokonoi, or Koko (ココ), is the former tenth generation Black Dragons commander.

History
When Coco was younger, he was deeply infatuated with Inui's sister, Akane, even though she was older than he by 5 years. One time, he tries to kiss Akane when she was asleep in the library, but Akane caught him. He confessed, and Akane agreed to wait for them when they became older.

However, tragedy struck. A huge fire broke out in the Inui house one night. Disregarding everything, Coco valiantly rushed into the house, saving whom he thought was Akane, but turned out to be Seishu. As a result of the fire, Akane suffered severe burns and fell into a coma. The treatment would be 40 million yen, which was a price not even Akane's parents could afford.

Thus, Coco did everything he could to learn about finance so he could raise money to save Akane. He realized that the fastest way was to turn to crime, so he recruited delinquents to do his bidding. Everything was for naught, for Akane eventually succumbed to her injuries. Coco became even more money-crazed afterwards in order to try to fill in void that was caused after Akane's death.

Etymology

 * The name Hajime means "one" (一).
 * Hajime's surname Kokonoi means "nine" (九) (kokono) and "well, mine shaft, pit" (井) (i).