Here’s the (edited) translation of p.144-145.
Azel and Sestren
Azel, the girl that becomes the key to the Azel incident. Who is she, exactly? To answer that question, although it will be explained later on (p. 154), Azel was kidnapped from the Restorative Faction by the Destructive Faction. She was a Drone (a humanoid with an artificial body and soul) that acted as a trigger for the Tower’s destruction. Moreover, she had the ability to open the gateway from the deepest part of the Tower to Sestren. Without her, it would have been impossible for Edge to go to Sestren, even with a Dragon. It is possible that the Destructive Faction installed this ability in her for the time when someone who could destroy Sestren would appear. Regarding the existence of Drones, even though we also have proof from records of regenerative tools left by the Destructive Faction, Azel is the clearest (?) form of Drone that ever appeared.
Ability of the tower
Currently (at the time this book is written), two types of Towers have been confirmed. The first one is the literal ?tower?, the vertical building that Edge attacked during the Azel incident. This one’s function is to regenerate and maintain the land’s surface, and to keep the land fertile.
The other type was seen during the ?SHELCOOF incident? (go to p.147). This one is called The Ship, since it’s shape was similar to a battle ship floating in the air. Its function is to regenerate and maintain the atmosphere, absorbing polluted air and purifying it inside, enabling circulation. It can be concluded that this Tower creates water, generates rain, creates seasons, and preserves the ocean.
Either type has the ability to produce monsters (lit: “offensive living being”). For the monsters, humans are food, thus making them a tool to control (“to weed”) mankind’s overpopulation. This is the way the Tower supervises humanity. As long as the Towers exist there is no way for humanity to be free from the spell of the ancient civilization.
After Sestren function stop
Because of Edge?s actions, Sestren was destroyed. All of its functions supposedly stopped, but there are no fatal changes in our body. Maybe this is because the effect of the Tower purification in the land and air still remains. It is also possible that after thousands of years, micro-organisms and vegetation that can purify land and air were created as a side effect.
Or it is also possible that after the Azel incident, the destroyed Sestren controlled only a fraction of the Tower, and other duplicates enable it to continue its activity. To prove this theory we will continue to study every area in the continent.
From now on, even if it will take a different form, humanity will protect the essence of the ancient civilization’s moral view and continue Production Activity. We will continue and never give up until the planet’s soul very end.
Birth of the dragon
Among the monsters produced by ancient civilization, Dragons are the strongest. Even though they were developed by both the Destructive and Restorative Faction, no mass production was ever recorded.
The reason the Dragon appeared during the Azel incident is related to the condition of the dying moments of the ancient civilization. In the final conflict of the ancient civilization, the Restorative Faction, which was beyond the grasp of technology, had the upper hand. The Destructive Faction believed that the war would end in the victory of the Restorative Faction, and mankind would be destroyed. According to their opinion, humanity would be driven to extinction, and only Sestren would remain, purifying soul and environment for the Tower.
But at the end of the war, the will of the Destructive Faction, ?The soul of the planet, and the continuity of human existence should not be controlled by technology?, was left as a formless attack.
The attack (?The end of humanity has to be decided by humanity?) was then successfully programmed into Sestren while it was still being constructed. But when Sestren discovered the existence of the program, it was viewed as bug and was purged. In response, the program created the Dragon. The Dragon was the remaining will of the Destructive Faction, but it was formed with an organic body and soul.
p. 144 above
The Tower that Edge attacked.
Usually, to counter attackers from the outside, the Tower would create mass amounts of monsters. Azel had the power to manipulate this function even from outside the tower. Because of it, Edge was able to attack the Tower.
p. 144 below
The ship-shaped floating tower. There is no further confirmed information about this moving tower.
Environment restoration activity by the Tower
Along with the function of purifying land and atmosphere, it releases monsters to reduce the human population.