Yuichi Nakamura as Kyosuke Kiriya / Kamen Rider Hibiki
Kamen Rider Zeronos Actor Yuichi Nakamura is going to return in Kamen Rider Zi-O Hibiki Part. He going to reprise his role as Kyosuke Kiriya after 13 years. In the final episode of Kamen Rider Hibiki, we saw him transform into Kamen Rider Kyoki or Transformed Kyosuke but in Zi-O it seems he had surpassed his teacher Hibiki and become Kamen Rider Hibiki now.
Episode 33's Trailer or pics, none of them have shown Kyosuke transformed or transforming into Hibiki. Only the announcement image shows him holding the Henshin Onsa. This image might be from Episode 34.
Shingo Kawaguchi as Todoroki / Kamen Rider Todoroki
After his appearance in Kamen Rider Decade, the actor had appeared as Kamen Rider Mage in Kamen Rider Wizard. Now he will reprise as Todoroki once again. Todoroki will help Sougo & others to fight Another Hibiki. Sougo will initially misunderstood for Hibiki.