For the Heroes who have occupied Saturn and the vast space beyond its orbit, "resource shortage" and "population shortage" are huge challenges. Moreover, the banner of prosthetic body can't be raised only at the frontier of the Solar System. Without extending their vision to the entirety of the Solar System, seeking merely to linger in its cold regions, this banner would lose its rationale for existence.
The residents of the Neutral City-States are exactly the force that the Heroes aim to rally.
Due to the extremely tragic lessons of the Fourth Martial God, Heroes rarely capture Space Cities and seldom construct them. Assassination within Space Cities, disrupting the organizational structure of Protectors, is a choice made out of necessity.
The residents of the Neutral City-States were driven here by war and man-made disasters, compelled to establish their city-states.
