

It may be a translation quirk but the seraphim who descended to earth are indeed barred from returning and deliberately set up to die, or in other words, they were exiled from paradise. The Descent of the SeraphimThe seraphim willing to coexist with humans descend from the Heavenly Realm to earth, although some accounts describe it as an exile note Both games' World Guidance timelines mention some sort of "exile" and "paradise" when talking about Brunhilt and Siegfried.

However, there exists a number of seraphim who are sympathetic to humans and believe that they can coexist, and thus they make an oath with the seraphim of the Heavenly Realm. To rid the threat of human malevolence, the seraphim of the Heavenly Realm wish to wipe them out entirely.Humans are known to seraphim as "earth-dwellers" living on the surface world, where they create malevolence that is toxic to seraphim.Beings known as seraphim inhabit the Heavenly Realm, "the true world", which predates the existence of the human world.It is also wrongly thought that this era came after the Temperance of Avarost.

By the time of Zestiria, the Era of the Gods is falsely stated to have occurred over 3000 years ago. Era of the Gods (Ancient Era)The era where the world was created, its details are largely shrouded in myth and lost to time, except for legend that seraphim and humans coexisted together.

Due to the Medieval Stasis caused by Innominat, these events are mislabelled in history as happening more recently than they actually did.
