Ratchet, the Autobots' medical officer, has a dry wit and dislikes risking injury for humans, though he relies on Raf Esquivel for help with tech. While skeptical of humans, he secretly admires their resilience. As Optimus Prime’s best friend and second-in-command, Ratchet is loyal but frustrated by missed chances to end the war, especially with Megatron. His grief for the loss of Cybertron drives him, and despite his flaws and pride, he would do anything to see his home restored.