Summary
Kinka serves as the Fighter Unit for Sleepless, a duo comprising himself and Ginka who are defined by their inability to sleep. They appear early in volume 2, where they are swiftly defeated by Soubi. As a result of this loss, they are forced to surrender an envelope containing critical information to Ritsuka. While they function as a competent pair, they clearly lack the skill necessary to overcome Soubi, with the possibility that they might only ever reach a fraction of his solitary power in the distant future.
