The Yamaji family are assisted by a pair of secret agents from the International Secret Police (国際秘密捜査官 Kokusai Himitsu Sōsakan?), who are assigned to apprehend various criminals from around the world. * Rei Yagyu (柳生 レイ Yagyū Rei?)/Valorous Ninja Reiha (貴忍 麗破 Kinin Reiha?) * Ryu Asuka (飛鳥 竜 Asuka Ryū?)/Spear Ninja Toppa (槍忍 突破 Yarinin Toppa?)