Hold still. This won't hurt a bit.
Autobot Ratchet was, at one time, one of the most promising medical minds on Cybertron. After his experiences with Lockdown, though, all he wanted to do was disappear. An assignment to a deep space repair crew was just what he was looking for. He never wanted to be in the middle of a new war against Megatron, but if that's where fate puts him, he'll do his best to keep his comrades safe and sound.