Kamen Rider Proto-Drive

Six months before the events of Kamen Rider Drive, during the Global Freeze, a mysterious black-colored vigilante was responsible for fighting and dealing with the Roidmude outbreak. Only referred as as the warrior (戦士), he supposedly wielded the Drive Driver or a similar equipment alongside the Shift Cars to protect and save Japan from destruction. At some point afterwards, he disappeared and has not been seen since, with Shinnosuke Tomari taking up his mantle to become Kamen Rider Drive.