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 infestions - Digimon - to a minimum. For reasons still unknown, Yamaki harbors an intense hatred for Digimon, although later in Digimon Tamers he is able to set this aside to work with the partnered children. 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 Otori Reika, one of his employees.