Ratchet

Ratchet is the Autobots' Chief Medical Officer. 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.

Although he's a healer, Ratchet often finds himself on the front lines of combat and, on occasion, the last hope the Autobots have. These pressures are sometimes too much for him to handle, but Ratchet ultimately never gives up.

Of all the Autobots, nobody has known Optimus longer than he has. Both are the closest of friends and look out for each other on the battlefield. While Ratchet considers Optimus his oldest friend and closest companion, Optimus considers Ratchet a true friend and a true soldier who is unwilling to give up on those around him.

Ratchet is one of the creators of the mighty Dinobots.