Yuto Sakurai is a major character in the tokusatsu series Kamen Rider Den-O. As Kamen Rider Zeronos, he fights alongside the main protagonist to protect the timeline from evil Imagin. The Altair Form is his primary fighting form, characterized by its green armor and sword combat abilities. Yuto is initially mysterious and distant but is later revealed to be deeply caring, especially towards Airi Nogami. His actions and sacrifices play a crucial role in the outcome of the series.