Naoya Kaido is a significant character in the series Kamen Rider Faiz, known as the Wolf Orphnoch. Initially introduced as a member of the Orphnoch, Kaido is a conflicted figure, torn between his human emotions and his Orphnoch nature. He often serves as comic relief, but also faces deep personal struggles regarding his identity and purpose. Throughout the series, Kaido develops close relationships with both humans and Orphnochs, making his journey and choices pivotal to the overarching storyline.