Touma Kamiyama is a novelist and the owner of the Fantastic Kamiyama Bookstore. Passionate about books, he can't stop talking about it once he gets started. He also has a heated side and values a promise above all else. He becomes Kamen Rider Saber, the flame swordsman, and joins the Sword of Logos after having a fateful encounter with the Sword of Flames, Rekka.