So, I'm working on a Star Wars RPG pilot/vehicle specialist and I wanted him to have a droid companion. The problem is most droids aren't terribly well-designed for fast movement or portability.
So the idea I had is a spider-type droid that can be worn as a backpack. It's 4 legs act as the "loops" to hold it on(They attach to points on a vest so they don't have to connect). It should have plenty of concealable "arms" to manipulate or repair things with, as well as a small place to carry small items such as a couple grenades or first-aid kits.