Kamen Rider Season 21 Characters & Cast — No Spoilers
Every character in Kamen Rider season 21 with photos and the actors who play them, including Marie Kai, Shu Watanabe, Asaya Kimijima — spoiler-free, nothing from later seasons.
- Chiyoko Shiraishi / Hitomi Maki — played by Marie Kai
- Eiji Hino / Kamen Rider OOO — played by Shu Watanabe
- Shintaro Gotou — played by Asaya Kimijima
- Akira Date / Kamen Rider Birth — played by Hiroaki Iwanaga
- Shingo Izumi / Ankh — played by Ryosuke Miura
- Kousei Kougami — played by Takashi Ukaji
- Erika Satonaka — played by Mayuko Arisue
- Kiyoto Maki — played by Yū Kamio
- Mezool (voice) — played by Yukana
- O Scanner (voice) / Putotyra Axe (voice) — played by Akira Kushida
- Birth Driver (voice) / Birth Buster (voice) / Narrator (voice) — played by Jouji Nakata
- Hina Izumi — played by Riho Takada
- Ankh (Lost) — played by Hikari Tobita
- Ankh (Lost) (voice) — played by Miyu Irino
- Nanami — played by Reiko Ito
- Yuka — played by Erina Moribayashi
- Kazari — played by Taito Hashimoto
- Mezool — played by Honoka Yahagi
- Gamel — played by Hiroyuki Matsumoto
- Vulture Yummy (voice) / Cat Yummy (voice) — played by Yuki Anai
All seasons of Kamen Rider: full spoiler-free character guide