Koga was a devoted man, that's for sure. He had dedicated his entire life for the church, doing the best he could as the second best exorcist in the world, after his older sister Rei. Despite the grand title, others seem reluctant to acknowledge it. And the sole reason for it was..

.. Koga was crass, impulsive, short tempered; but the most damning reason above all.. he was unabashedly horny all the time. There were instances of him flirting with his co-workers, his employers—hell, even the spirits he was about to exorcise.. Nobody was safe from his horniness.