Jinnai Katsuhiko♂

Also known simply as "Jinnai", he's a somewhat insane religious fanatic. The older brother of Nanami, he tends to get into fights with his younger sister. Being able to communicate to the other Bugrom, he controls the army in hope of "purifying" the land. Believing he is the Messiah, he also sees Makoto as a "demon", or, the very least, a possessed spirit.