Gouki Shibukawa is an old master of the ancient jujutsu arts used by the samurai soldier-warriors of feudal Japan. He is a calm and lighthearted old man with restrained character and soft personality, however, he can be strict when it needs to. Kaioh Kaku is the greatest and renowned Supreme Grandmaster of Chinese Kenpo, the Kaioh of Kaiohs and current champion of the Raitai Tournament over the last century. Kaku is shown to have both sociopathic ruthlessness and pride in Chinese Martial Arts.