Mao operates as an information broker in Yokohama, usually accompanied by his associate Tanker-kun. He possesses brown hair, brown eyes, and an average build, consistently wearing black glasses. His demeanor is notably laid-back and casual, often eating during encounters and showing little concern for others unless they are clients. Despite this relaxed attitude, he demonstrates dedication to his work while recognizing his personal limits. His attire features a long green Chinese cloak in *Hamatora: The Animation* and shifts to a light brown track suit in *Re: Hamatora*. His background, associations, activities, and narrative role remain focused on his information brokerage within Yokohama across all documented media, including the film *Fw:Hamatora*.