Mitsuo Yamaki

Mitsuo Yamaki is the head of Hypnos, a clandestine subsection of the government that is centralized in Shinjuku, Tokyo. Hypnos itself is located within the Metropolitan Government Office Building, and is dedicated to keeping digital infestations - Digimon - to a minimum. In a Wikid magnazine{Though not-cannon}, Mitsuo was raised to see order as the only thing that keeps the world from decending into anarchy, which is why harbored an intense hatred for Digimon, whom he saw choatic threat to Japan.

After the Deva saga, when he was temporary fired, Yamaki was able to set this aside to work with the Digimon & partnered children. Once back in his position as head of Hypnos, he managed to help the Tamers with the Monster Makers in the forms of the Ark/Grani & Operation Doodlebug. In Runaway Digimon Express he helped the Tamers by commandeering the Train Station to moniter Locomon through their computer network and when he found out the Tamers were involved he updated Takato on the situation via Ruki's Cell Phone. His trademarks are a pair of sunglasses he rarely removes and a steel Zippo lighter, which he clicks when preoccupied. His closest relationship in the series is to Reika Otori, one of his employees.