Ratchet

ラチェット

Ratchet (Red Alert) was once a fierce warrior. It was only after being seriously wounded and permanently losing his hand in battle that he was able to step back and realize how terrible war is. He is now a reluctant fighter, somewhat emotionally detached, and prefers repairing his friends to tearing his enemies to shreds. This does not mean he has become a coward. On the contrary, when a fellow Cybertronian (Autobot) on the battlefield requires his immediate medical attention, he will be there no matter what it takes. He is a brilliant medic and scientist, but he is also extremely cautious.
His nominal micron (Mini-Con) partner is Hook (Longarm), though during the search for the Planet Forces (Cyber Planet Keys), he was accompanied to Speedia (Velocitron) by Drift (Dirt Boss).