Satellite Kingdoms

Satellite Kingdoms are shown to exist in the Seraph of the End series where they are spread across at least seven astronomical objects. If the one on Earth is anything to go by they are technologically advanced irregardless of the time period of each planet. Kingdoms likely formed by seraphs, they were a feature of the Babel Project that was to return them to paradise.

Details
Where the construction of towers among satellite kingdoms is being discussed, a visual illustration on a screen shows the Sun along with planetary bodies. From this, the satellite kingdoms may be located on the planets Mercury, Venus, Earth, Mars, Jupiter, and Saturn. The one on Earth is the only indication of the features of these satellite kingdoms. From the civilization of seraphs and homunculi, there are artificially created structures of which the one on Earth is shaped into a pentagram when viewed from Space.

Given the quartz crystal-like buildings, these constructions may have been fashioned through some means using building materials on the planet, or brought in from elsewhere and placed on it. On account of its size and little evidence that native planetary materials have been gathered, it is probable that these crystal like seraph civilizations are made through their own means. Generating their own habitual places would perhaps be practical rather than harvest resources from area like the Sun, or Jupiter which like Saturn is a gas giant. One satellite kingdom is on the carbon dioxide heavy atmosphere of Venus, so the natural state of a planet is apparently no obstacle for seraphs in forming civilizations on them.

Where photons are a source of power for seraphs, it is probable that this sun-like energy was used to some capacity in other kingdoms as it was on Earth. From the Tower of Babel being formed, other kingdoms may share having a colossally huge thin structure that reaches seemingly up to Space. Likely also featuring Unrailed Elevator Technology these satellite kingdoms are technology-based formations.

It is unknown if seraphs and homunculi made up the populations of other satellite kingdoms. Even on Earth where dinosaurs were alive there is no apparent interest in them by these beings. Also unstated is whether the seraph effected plague has spread to these other colonies. Referred to as satellite kingdoms, it may imply that seraphs and homunculi's true area of origin is somewhere other than these celestial spheres.

Earth

 * Sika Madu
 * Bael
 * Paimon
 * Amon
 * Belial
 * Astaroth
 * Marbas
 * Bathin
 * Naberius
 * Raum
 * Orobas
 * Mikaela
 * A homunculus named Yu

The Sun

 * God

History
As the King of Earth at the time, Sika Madu announced to many seraphs how he had been officially notified that the tower they made is taller than all others among the satellite kingdoms. Sika Madu may have been directly involved with constructing such towers in other areas. Visible on a flatscreen, markings apparently indicated the locations of these towers and the satellite kingdoms themselves which were not spread across Earth but were on different planets.

The purpose of these kingdoms appears tied to the Babel Project which was to return seraphs to a paradise said to be located where God was. At least the Earth kingdom if not others succeeded in gathering the required amount of light for angels to return to paradise. The Earth kingdom came under attack by seraphs who acted to blast apart a homunculus that Sika Madu had directed to darken the gathered light in order to resurrect Mikaela.

For Sika Madu's resurrection attempt, the Tower of Babel on Earth was toppled by seraphs who were aiming lightning at him. The Earth kingdom was also obliterated by a humanoid angel who generated a rain of meteor fire to level the civilization. All the seraphs were murdered, and their souls bound to the world. Aside from cross-shaped grave markers, all traces of the seraph civilization on Earth were gone and the planet was left barren for Sika Madu now as an undead to burn on.

The activities on Earth ended with God and seraphs apparently taking no further interest in it. Seemingly no longer regarded as a satellite kingdom, it was left with no further seraph activity before millennia later Sika Madu would find the means to shield himself from the light. From that, Earth's history would be shaped differently by the humans his and Yu the homunculus' power would make.

Story
That Earth was regarded as the Sol System First Satellite Kingdom is something known only to those involved with these establishments. Other planets being visually shown along with Sika Madu's announcement provided the revelation to Yu and Mika of these areas' existence. As there are no traces of the seraph civilization on Earth by the time humans evolved ages later may mean the others are long gone too.

The distinctly shaped civilization on Earth was in the design of a pentagram and one viewable from Space, where no astronomy-based study has detected such formations on different planets. It was only memory delving that revealed the existence of these satellite kingdoms. The destruction of the kingdom on Earth was known to Yu and Mika.

Trivia

 * Where the world of Seraph of the End is based on the real one, the identically named planets have been brought directly into the story.