To increase Aquarion's flexibility in combat, a special teleport system labeled "Element Change" allows pilots to be called back and forth between the vectors's cockpits and their posts at Neo-DEAVA's command center instantly.
Neo-DEAVA is the organization responsible for Aquarion and the Elements that pilot it, in a position similar to its ancestor DEAVA 12,000 years before.
Years ago prior to the story, the women of Altair suddenly stopped giving birth to girls, and those who were alive started dying one by one until only the men were left.
Since then the Alteans started looking for females with strong elemental powers dubbed as Rare Iguras (レア・イグラー, Rea Igurā) hoping that one of them may withstand the disease and become their "True Eve".
Later it is revealed that both Altair and Vega were once the same planet, separated after the Tree of Life's collapse twelve thousand years before in Genesis of Aquarion.
The Aquaria (アクエリア, Akueria) are formations the Vectors made before Amata Sora managed to remove the seal between them, preventing the unification between members of opposite sex.