Holder of the Integrity bead. Genpachi is a captain of the imperial military police. Like his foster brother Kobungo, Genpachi was sent on assignment in the north three years ago and returned a changed man. Now he transforms into a demon who preys on supernatural beings.

He and Kobungo's sister Nui were once lovers,
Stupidly obsessed with Shino at times, Genpachi seems to be one of the most perceptive ones, understanding how difficult it is for Shino and Sousuke to live the life they're living now, making him look more adult than others.

Genpachi's also very popular with women of any age, however he doesn't seem to be interested in any of them.

The staff at his house seems to be rather fond of him, including his old butler.