R5-F0 ("Efzero" to his friends) is the astromech droid assigned to Green Thirteen. It lacks the flying capabilities of R2-D2 and its motivator has been known to blow out once in a while. But unlike the standard R2 statblock in the book, Efzero comes with that little lightsabre launcher tube already installed.
"Man, is there anything Jeff CAN'T do when it comes to gaming? This guy is like a critical 20 every roll. Jeff can bite the heads offa five game geeks, including their sorry-ass DM, and spit 'em into a large duffel bag ONE AT A TIME!...that's just the kind of messed up bastard he is! You think yer a gamer, punk? Well..do ya? Jeff will depants your weasel-ass right in front of your grandma."