Roller is an Autobot support vehicle and reconnaissance unit in the Transformers franchise, best known as a remote-controlled scout associated with Optimus Prime. Rather than fighting directly, Roller helps with surveillance, transport, and tactical support, extending Prime’s reach into dangerous areas. In many versions, he serves as a practical field asset and a symbol of Optimus’s preparedness and leadership. Because the character’s depiction varies across Transformers continuities, Roller is usually identified by this single name rather than a traditional first-and-last name.