Ratchet is an Autobot and the resident medical officer of Team Prime. Ratchet is known as the doctor and scientist of the Autobots. On Earth, Ratchet wasn't too fond of humans at first. However he was able to work and learn with them, which he began accepting them as a noble species and friends. Ratchet is usually the cranky old bot but Ratchet is the best medic and friend to have. Ratchet would do whatever it takes to aid his team/family, and deal with any threat that came in their way.