The city is protected by the Gundam Force, the robotic members of which are designated Combat Mobile Citizens.
The Neotopia characters are modelled after SD Command Chronicles and the Earth Federation Mobile Suits of the Universal Century.
Ark is a land similar to feudal Japan, populated by techno-organic Musha Gundams who are often embroiled in civil war.
Similar to medieval Europe, Lacroa is a beautiful kingdom where magic is highly common (the exception being the Dark Hole, a large pit where only the power of spirits works).
The royal family are protected by a specially selected group of Knight Gundams, prided for their skill and chivalry.