While a member of the American Mafia under the alias "Bean", he killed one of Go Shijima's best friends, Ethan Woodward.
After 017 and 018 come back to Japan, they begin selling wristbands that allows user to copy the Roidmude's Heavy Acceleration ability in the black market underworld. However, their criminal operation was unearthed by Go Shijima, who pursued them to Japan.
When both Drive and Mach began to catch onto the Roidmudes' operation, Mashin Chaser was sent to be their bodyguard. After Go infiltrated their base, the three Roidmudes chased after him until Drive and Kiriko came to his aid. Go then transformed into Mach and destroyed both Gunman and 018.