Ostensibly a private detective. In reality, he is a descendant of the Tenzai clan, ninja-for-hire since feudal times. As well as "working" as a private detective he is currently in the employ of the Koryuji family as the tutor of their daughter Mii. During battle he displays complete command of the fabled sword of the Tenzai, "Nyoraito," a giant shuriken on his back called "Sharinken" and the blades "Hassojin" attached to his feet by wires. He has also mastered the art of creating copies of himself. He has a little bit of an attitude and tends to avoid anything resembling hard work. Nevertheless he treats Mii with respect, calling her "m'lady."