Gou Shijima (詩島剛) is a main character in the Kamen Rider Drive series, part of the wider Kamen Rider franchise. He transforms into Kamen Rider Mach and later, Kamen Rider Chaser Mach. Gou is the younger brother of Kiriko Shijima and is known for his brash personality and determination to fight the Roidmude threat. He often struggles with his own motivations and sense of justice, evolving from a lone wolf to a reliable ally for the main protagonist, Shinnosuke Tomari.