The Mechanical Ones were a technological sub-group of the Hej'sorai.
They primarily used Technology (as said) and were even Cyborgs.
(although normal Hej'sorai used technology)
As a Mechanical One, they were skilled in different kinds of technology and knew how to create droids.
They were a unisex group, but primarily had females.
They were an exception and used Electro-staffs and batons, and also stunning weaponry.