He is the first of the Maruhage Four Heavenly Kings, as well as Bo-bobo's former friend and sworn rival. Gunkan is a man with a long black pompadour hairstyle and a white beard. He wears a green shirt version of Bobobo's original outfit with red lederhosen straps attaching to blue trousers with brown shoes. He and Bo-bobo share the exact same body build; a large upper-body build, and very thin legs. Gunkan has been shown to have a sensitive and emotional side.