"Ahem...Rex was the natural choice to command the Rhino 5. His quick wit, dashing charm and strategic mind are all the tools he needs to see his crew through peril and adversity. A brilliant leader, a role model a hero...Excellent. Whoopsie, no, wait...don't write that last bit down, Ron."
The pilot is the first line of defense against incoming threats - and Dodge Rockskipper is as solid as they come. With her icy calm exterior and level head she makes sure that when the Rhino does get, it gets hit by the right rocks.
The 2nd line of defense against those rocks is having a strong shield. Ron is at his happiest when using his gauntlets to harness energy into shields for the Rhino - in fact it's pretty much the only thing that makes him happy.
If your pilot flies into a rock and your shields are gone you're going to need a trusty wrench to start fixing things. A cracked hull or a cracked joke - Lance fixes one and mangles the other.
"Forlorn" was a simple maintenance bot, until it took a rock fragment to the head. Now it has become a relentless machine...that thinks nothing but happy thoughts and about its love for its pal, Ron Guard. But, with its mood management module damaged, it can only converse through joyful, optimistic shouting and angry sounding, highly physical gestures.