Mitsuya Koinuma

Mitsuya Koinuma is a B-rank Shooter and a member of Mamiya Squad.

Appearance
Koinuma is a light-skinned young man of average height and build. He has middle-part, straight sandy hair that covers his ears and reaches to his chin. Like the other members of his unit, in his Trion Body he wears dark pants, a lighter jacket with a high collar, and boots of the same color, as well as dark-rimmed goggles with square, protruding lenses.

Introduction Arc
Mamiya Unit is presumably involved in the extermination of all Rads in Mikado City.

B-Rank Wars Arc
In the round one lower-group match, his squad goes against Yoshizato Squad and Tamakoma Second. They are easily taken down by Yūma after Chika destroys their hideout.

Abilities
As a B-rank agent, Koinuma should be more skilled than a C-rank trainee. His squad's foremost tactic is a combined attack which sees the three Shooters focusing their Full Attack Hound on a single target. This technique, called Hound Storm, was extolled by Ken Satori as a very powerful attack. However, the whole unit was easily defeated by the combined might of Chika and Yūma without managing to put up any form of resistance.