Helium 7.5" (scrap wood, electric motor casing, camera lens bracket, CO2 cartridges, vendor capsule, furniture rollers,

sewing machine dial, paper shredder blades, door lock flange , etc.)

Number 5 in the "Noble Gang of Six", Helium scoots around on his rollers as his helmet keeps his fine tuned computer brain immersed in helium for maximum efficiency. I imagine he speaks in a very high pitched voice.