The rectangular slab could be adjusted to pull out a handle from each end on one side; present on the other side was a rotor that could also extend out. The rotor only had the related mechanisms in place. There were no blades attacked to it.
The blades would be the energy blades that could expand to a length necessary to carry them respectively.
There were two rotors in total: The big one that lifted his weight, and the small one facing the front that worked in stabilising the flight.
Even the shape of the rectangular slab was created as an aerofoil to increase the stability of flight and to allow better aerial manoeuvring.
"Impressive," Compass Carburettor remarked, feeling the smooth but sturdy sensation of the Darble body of the Katia. It wasn't too heavy and could be actuated like an Armament. The moment he activated it, it would expand from its form as a rectangular slab into the hand-held copter necessary to take flight.