Taiga Nobori is a major character in the series 'Kamen Rider Kiva', part of the long-running Kamen Rider franchise. He is known as Kamen Rider Saga, the mysterious and noble Fangire King who opposes the protagonist, Wataru Kurenai. Ambitious, conflicted, and struggling between his duties as king and his personal feelings, Taiga is a tragic figure whose actions significantly impact the story's direction and the fates of many characters.