R2 Unis are Modules which attach to a kyberpod.
R2 Units (we probably have to call them something differently so as not to piss off Disney)
R2 Units are friendly, helpful robots that get attached to a kyberpod. They help the Kyperpod pilot with various tasks.
Basically think of R2D2 and copy it for our game. But because this is Kybertrike, we can attach and eject the R2 Units at will. We can trade them with our buddies. We can try different R2 units and find the one that suits us the most.
We could bundle in actual LLM to make them chatty if we wanted. IDK, maybe.
They could be cute anime girl bots with animal ears if we wanted.