Go Shijima (詩島 剛 Shijima Gō) is Kiriko Shijima's younger brother, the son of the Roidmudes' creator Professor Banno, and a freelance photographer who utilizes Signal Bikes to transform into Kamen Rider Mach (仮面ライダーマッハ Kamen Raidā Mahha), as well as Kamen Rider Drive's Shift Cars for additional power. He had been stationed in America, but returned to Japan to aid with the emerging Roidmude crisis. Go is prejudiced towards the Roidmudes and goes to great lengths to destroy all Roidmudes, even the ones that protect humanity and the ones that desire to live in peace.