That’s the one, the li’l blue guy; he’s like the Pete Best of the Transformers. Ostensibly his function was to act as a ‘scout’ for Optimus, which must have sounded like a massively important job at first-- you can just imagine his giddy robotic excitement (“Gosh! I can hardly believe I’m really going to be the personal scout for Optimus Prime himself!”). Of course, that was before he found out that:
A. ‘scout’ is Cybertronian for ‘secretary,’ and
B. his workspace was designed to retract into his boss’ colon.
Poor Roller. If anyone could identify with Lovecraftian horror in their daily routine, it was probably him:
“–mumble mutter gripe bitch rasser frasser–”
“ROLLER? THIS IS PRIME. DID YOU SAY SOMETHING?”
“–GAH! Uh… No! No, I was…er…just…admiring the view. Of the inside of the trailer…as per bloody usual.”
“WELL, I’M ABOUT TO PULL INTO THIS FLYING J; I WANT YOU TO SCOUT INSIDE AND GET ME A PACK OF RED MAN AND A PENTHOUSE-- HOLD UP! DECEPTICON ATTACK! MUST TRANSFORM…NOW!”
"WAIT! Jesus, not again! At least let me get out of the-- NOOOOOOO!!!"
TRANSFORMER NOISE
I just never thought of “him” as much of a character, since he never had any lines, and seemed to serve as more of a drone than another robot with a distinct personality.