Rapid Run is a member of Team Bullet Train, a trio of Autobots who patrol the railways. The physically strongest member of the team, Rapid Run is always eager for action, cool-headed and sarcastic. You don't have to ask him twice to tackle the Predacons or Decepticons... in fact, more often than not he's already firing away before you could ask once. And, with the ability to generate an almost impenetrable force-field, he can take just about any punishment they throw back at him.
His alt-mode is a 700 Series Shinkansen Rail Star.