Eureka Seven Vol.1: Flight of the Birds
The Ageha Plan is the theory first proposed by Adroc Thurston that the Scub Coral is an intelligent, sentient life form that is trying to communicate with humanity, as well as the plan for humanity to seek out co-existence. The report was locked away after his death, but later appropriated by Colonel Dewey Novak, a move aimed at gaining public support by associating himself with Adroc Thurston, despite Dewey Novak's true aims being directly opposite to the aims of co-existence proposed by the original Ageha Plan.
Summer of Love:
The Summer of Love is an event that took place approximately ten years before the events of Eureka Seven, sparked by the first use of the Amita Drive with the Nirvash. An enormous, non-stop generation of Trapar waves resulted, and the confusion and chaos that resulted from this disaster sparked conflicts around the world, leading to civil wars that left tower states completely destroyed. In the Anime, Adroc Thurston died putting an end to the effects of the Summer of Love, or rather, became one with the Coralian Command Cluster as learned in episode 48. In the Manga, he stopped the Summer of Love but was killed by Dewey Novak.
Vodarac is a religion with many believers in the world of Eureka Seven. Their peculiar views and beliefs clash with modern science, especially in regards to treatment of the planet. This, coupled with the existence of extremist factions in the religion, have led the government classify the Vodarac as a dissident faction, and it has on more than one occasion engaged in military campaigns against them. The prominent conflict depicted in the series is the attack on Ciudades del Cielo (Spanish for "Cities of Heaven", although literally it translates to "Cities of the Sky"), the city seen as holy grounds for the Vodarac, where the S.O.F troops stormed a supposed Vodarac extremist stronghold.
The Limit of Questions:
The "Limit of Questions" (件の限界 Kudan no Genkai) is the theory that too much sentient life in a given space will collapse reality, resulting in a black hole-like tear in space that would absorb the entire planet. According to this theory's developer, Dr. Greg "Bear" Egan, the Scub Coral itself had already reached the Limit of Questions, but avoided total collapse by going into a dormant state. This theory is solely related to the anime and is not mentioned in the manga at all.
Wall The Great Wall is an example of the effect of the Limit of Questions being passed. It is a large, unstable area of whirling Trapar winds visible from outer space. It was created at some undefined point before the beginning of the series when a large portion of the Scub Coral was abruptly woken from its dormant state. The Scub Coral managed to put itself back to sleep before the Limit's consequences engulfed the entire planet. Common physical laws no longer apply in the area encompassed by the Great Wall.
The Zone is a visual effect produced by extremely high concentrations of Trapar particles and dust, which result in the mind seeing an endless corridor surrounded by brightly hued colors. Typically, the effect of the Zone is seen when trying to penetrate a Kute-class Coralian, but it may also manifest if a high enough concentration of Trapar happens in a closed space. The Zone is often depicted as a gateway, either between mind and matter or physical destinations.
Skyfish are creatures that have adapted to float upon the Trapar waves that fill the atmosphere. They are harvested to create a substance known as "reflection film", which is what permits the machinery of Eureka Seven to fly without the use of fuel-based propulsion. It is said that skyfish gather where positive emotions are emitted by humans in the presence of a Compac Drive.
Desperation Disease is a coma-like condition in Eureka Seven. Those suffering from it become near-vegetables, save for a fixation on a Compac Drive. The sickness is related to the relationship of the Scub Coral, the Trapar, and the Compac Drive; all three together drive the victim deep into a trance which leads their consciousness to the coralian command cluster. It is often said that the disease affects not only the victim but those involved with the victim (i.e: family, friends, loved ones).Pile Bunkers Pile Bunkers are rod-like objects driven into the ground to suppress the tectonic shifts in the Scub Coral, which otherwise cause humongous, mushroom-like coral formations to erupt from the ground with little to no warning.
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In the world of Eureka Seven, the world is now at peace with itself. The Vodarac has taken down the governemnt in hopes of perfecting the world. Months after the "Great Struggle" people began to surf the winds one more in the safety and prosperity of their own society. Something within grew into a better understanding of recent wars and struggles for power amongst the people of planet earth. The Sub Coral, an intelligent, sentient life was at ease with some parts of the Land of Kanan. But deep within the heart of society there is a great evil growing, and its target is humanity. Another sentient life was awaken from its deep sleep which was a primitive type of sentient being. The being was called, "The Plasma" with the direct recollection of past plate tectonic shifts. People all over Kanan are fearful of this creature for which can destroy the planet itself. There have been lots of studies and documented proof of this being and scientist fear that this will bring about the end of the world if such a creature is to be awaken. But it was too late, the Plasma was already awaken and clawing its way out of the earth's core.