Ratchet is the Autobots' Chief Medical Officer (as well as the veterinarian for treating the animals). If something's broke, he can fix it. Ratchet is known for his irreverent bedside manner; He loves having a good time, and his party-loving nature has given him a dry wit. He is not a particularly mighty warrior, which sometimes leads him to believe that he is expendable. Optimus Prime has trouble convincing Ratchet that this is far from the truth. His Autobot partner Jolt was medical surgery.
His alt-mode is a Nissan C20 Vanette Ambulance.