Roller

Roller is a small, six-wheeled scout car that functions as part of Optimus Prime’s trailer unit. He is remotely linked to Optimus, allowing the Autobot leader to monitor situations through him. Roller is primarily used for reconnaissance and support, extending Optimus Prime’s abilities beyond his own physical presence. Though small, he plays an important role as a trusted extension of Optimus in the Autobots’ fight against the Decepticons.