RF-13 is something of an enigma. Whilst most Roboticized Worker-Bots trudge about with depressed or blank frowns and thousand-yard stares, this one bumbles along with a cheery smile and contented eyes. They would be considered a liability, if not for the fact that their positive attitude gives them good work ethic and reliability with all duties given to them. So long as Snively ensures Robotnik never sees the smile on their face. It's good to have at least one willing worker in an undertaking as unwieldly as keeping Robotropolis running! Yeah, I just love this Roboticized Fox from the SatAM intro! I know his smile is probably due to a corporate mandate that 'evil' characters have to smile if they get to close to the camera for comfort in regards to the child audience, but I think Roboticization is a cool concept and I love the unintended implications with this Worker-Bot smiling through it. Maybe they're brainwashed, maybe they're dissociating; I dunno, I just want to believe they're having a good time.