So, let's look at the Autobot cast as they were designed - a repair crew. Optimus Prime - Washed out of the AUtobot acadamy. Best job he could get was captain of a broken down maintence vessel. Ratchet - Retired war veteran. Unable to cope with retirement, he'll take any job he can get, even if it's fixing space bridges. Bulkhead - Obviously designed for demolitions type work. Inevitable he would end up on a job lik this. Bumblebee - Young kid - you kinda get the impression that this is first job. Works around generally with the repair crew. Prowl - Ninja? So, why is there a Ninja bot with a bunch of repair bots? All the others can fit into the repair nitch nicely - except Prowl and Prime. They question why Prime has his skills, but nobody questions why Prowl does. So, what's he do? What's his job on the ship? I have a theory. It's simple - Prowl is the security guard. He's combat trained - not acadamy trained like Prime was, but he's designed to handle himself in a fight, in case the Maintence crew runs into some low level trouble - Pirates, perhaps. Not a match for a fully trained Decepticon, and it's likely his security training has gone to his head. So, anybody else have a theory?