Seraph Civilization

The seraph civilisation was revealed to have existed in the prehistoric past in the Seraph of the End universe. Unofficially called a seraph civilisation since the settlement has not been named, its name is on account of the many seraphs that were seen to have existed during this time. Based on the numbers of them, it was also a homunculus civilisation where these beings co-existed with seraphs.

Details
Well-established into the Cretaceous era when dinosaurs were alive in the world, a section of this vast city was located beyond a smoking mountain. On the other side of a cliff a long thin tower would come into view that was seemingly not visible from greater distances. The first indication of something out the ordinary in prehistoric Earth, the other was the tower like buildings visible below from the cliff top. From what Mika says, the city was ten times bigger than the present day cities of Shibuya or Shinjuku. The view from space would show the civilization forms a colossal star shaped pentagram across a section of Earth that radiates at night.

"From what we saw looking down from the mountain, this city is ten times bigger than Shibuya or Shinjuku!"

- A description of the seraph civilization's size compared to modern day cities.

Within the enclosure of natural appearing rock, at various stages of development are many towers that seem to be formed from huge selenite crystal like structures that make up the civilization. These rock formations are light in coloration and appear melted and deformed in parts on what may be the outskirts of this section of the city. The more shaped structures resemble towering buildings feature windows, and pipe like constructs in parts. There are very clean cut dark lines placed horizontally across buildings for some purpose. Long horizontal windows would also serve as access points to towers. Thin overall, more so as they angle and taper nearer the top, there are many such buildings rising into the air. The other man-made appearing formations are the circular walled creations. From the two seen they also bear pipes as well. Although the both the living occupants floated, the pavements were also flat and suitable for walking on where they appeared to be fashioned of the same crystallized substance. For the seraphs floating close to the ground their reflections appeared on this floor.

Inside one of the large circle walled structures rises the Tower of Babel, an exceptionally thin building that is slanted at an angle. By far the tallest structure given that all others are huge yet barely higher than the surrounding mountain terrain, the Tower of Babel extends high into the air and there is no reason to doubt it does not reach into space.

Technological features existed during this time and advanced ones at that. Large dark rectangular screens levitate in the air to display written and other visual information. In the Tower of Babel there are electronic like aspects such as identity recognition access points. Voice communications can detail how the Tower of Babel project will return members to paradise. Unrailed elevator technology exists and can transport seraphs and homunculi upwards. Elevators use a button system which can take individuals to rooms. One such room can display a night sky like effect on the walls. Sika Madu was seen in a floating chair before many levitating flat screens.

Society
The airborne residents travelling in between the towers are seraphs and homunculi. Co-existing with one another, at all levels they float individually and in groups of others. The seraphs are more likely to travel in groups compared to homunculi which head where they are going alone or with them. Although there are dinosaurs around in the world at this point, even the few Pteranodon in the sky above do not enter the civilisation proper. The seraphs and homunculi are sentient and capable of reading text based details. Accordingly, text and visual guides are present some of which advertise ice cream that has been formed in this prehistoric setting.

"Wow, you're right! There is an ice cream thing there."

- Ice cream had been formed at this point.

Within the Tower of Babel there is an identification feature in place which grants access to certain individuals to deeper within the tower. Both seraphs and homunculi are permitted entrance here. While Sika Madu occupies a room in the Tower of Babel he does not appear as invested in the seraphs and homunculi that exist in the wider city. Indeed he has warned his son Mikaela not to eat anything from town, and tasked a homunculus to keep an eye on him.

Known Residents

 * Sika Madu - His room is accessed by choosing the highest floor of the Tower of Babel. The First apparently spent time here in prehistory.
 * Mikaela - Sika Madu's son who went outside into the seraph civilization for ice cream, and the dinosaur occupied wider world at the time.
 * Seraphs - The most seraphs ever seen were here in this prehistoric civilization. They were involved with the Tower of Babel project to return to paradise.
 * Homunculi - Spherical eyeball like beings, many of which occupied this city with seraphs.

History
This civilisation was well-established when Cretaceous era dinosaurs were alive in the world. Among the many towers floated seraphs and homunculi. While Pteranodon soared overhead the civilisation, the settlement did not have any dinosaurs within the streets themselves. Both seraphs and homunculi travelled individually or in groups throughout the city. In the civilization there were dark floating boards available with text and diagrams presented.

As the sun sets, it is the crystalline rocks that make up the seraph civilization that are generating a light. The view from space is a large shining pentagram across Earth. Where they were very active during the day with many seraphs and homunculi viewed, there are dramatically fewer of seen by the time night arrives. Mikaela was floating through the streets holding two ice cream cones along with the homunculi with him. Two seraphs are viewing a sign displaying ice cream around this time.

Floating lower on the ground, a lone homunculus amongst the seraphs began an ascent to where it was heading. It went in a different direction to where Mikaela and the homunculus with him was going. Mikaela and the homunculus flew to a section of the Tower of Babel, and spoke how Sika Madu was within.

Seraphs and homunculi were inside the inner wall around the slanting tower. Where two seraphs were nearby, one had its identification checked and was granted entrance deeper within the tower. Welcomed to the Tower of Babel, a voice communicated that the project was to return them to paradise. In this section, there were elevators taking seraphs and homunculi physically up the tower. Sika Madu was occupying one of the floors.

The information gathered at this point in time within this seraph civilization was available to read on the technologically created screens that existed by Sika Madu. This location was where Sika Madu learned that Mikaela had acquired ice cream that he was not familiar with. A data analysis system of some sort could be materialised to check the ice cream. The First also saw that Mikaela had named a homunculus Yu. After he fell ill from ice cream, a cleansing room was prepared for Mikaela to be taken to.

Story
In an attempt to resurrect everyone, and with having memories from before he was born, Yu and Mika decide to explore the past. Having set up residence in the Sea of Trees around Mt. Fuji in the present day, the memory delving takes them to a furthest point back when dinosaurs were alive. In following Mikaela and the eyeball being he was with, Yu and Mika are stunned to find that there was not only a vast civilization that was on Earth well before man-made creations were able to be formed, but that it was also filled with seraphs and more of the floating eyeball entities.

Finding they could not be seen, Yu and Mika still take into account that they could be bumped into by the residents in the memory. The maps seen are unreadable to them both, and Yu and Mika discussed whose memory this is. In desiring to explore this city under the pretext of finding Mikaela who they had followed here, Yu hears from Mika that it is far larger than Shibuya or Shinjuku.

Exploring until nightfall, Yu wonders whether there was any restaurants namely ramen ones in the city. With Mikaela heading past, Yu returns his consciousness to the cabin in the Sea of Trees where his physical self is to eat in order to acquire energy. Meanwhile Mika attempts to follow Mikaela and would hold onto a passing homunculus who in the memory flew upwards where he was. With Yu returning to the memory, he and Mika discuss how Mikaela was heading to the tower ahead. The demonic power they can now draw upon allows them to leap across sections of the city to reach him.

In entering the tower, Yu and Mika access the inner column that required seraph identification. Able to use the elevators, one would have brought them to the highest floor where Sika Madu was. Where the language was indiscernible before, Yu finds he could read information available. Knowledge concerning the sun's power and darkening was gathered, as well as resurrecting the dead and creating servant tribes. Unbeknownst to them, Yu and Mika are able to be seen by the homunculus named Yu in this part of the memory.