The X series robots are bipedal panzer, co-developed by the Police Department and Defense Agency, and conducted by General Sugawara of the ground army. The cockpit contains a nerve transplant device to connect the pilot's brain with the operating system of the robot for enhanced synchronization. The firepower from a [//en.wikipedia.org/wiki/ M249 light machine gun] and [//en.wikipedia.org/wiki/ L16 81mm mortar] and the "Muramasa Copies" wielded on their right arms for sealing the Persona ability from Persona users temporarily suggest the purposes of development of these machines are far beyond the nominal riot control.