本作继《铠武外传 假面骑士斩月/假面骑士巴隆》后，另一部特摄片《假面骑士铠武》的衍生外传作品，本作分为《假面骑士杜古》与《假面骑士纳高尔》两篇故事。
Tsunenori Aoki
Ryoma Sengoku / Kamen Rider Duke
Yuki Kubota
Takatora Kureshima / Kamen Rider Zangetsu
Minami Tsukui
Yoko Minato / Kamen Rider Marika
Kazuki Namioka
Lock Dealer Sid / Kamen Rider Sigurd
Jun Toba
Kugai Kudo / Kamen Rider Saver
Gaku Matsuda
Zack / Kamen Rider Knuckle
Yutaka Kobayashi
Kaito Kumon / Kamen Rider Baron
Mahiro Takasugi
Mitsuzane Kureshima / Kamen Rider Ryugen
Ryusuke Nakamura
Shura / Kamen Rider Black Baron
Naoki Saito
Believer
Takashi Kikuchi
Eiichi Takagi
Akihiro Hosokawa
Employee
Satoru Hirako
Researcher
