The Simulated Global Environment Model "CHALDEAS", also known just as CHALDEAS and the Alien World, is the overarching antagonist of Fate/Grand Order. It is a Mystic Code created by Marisbury Animusphere with the purpose of fufilling its creator's Grand Order.
The Foreign Planet CHALDEAS is the true identity of the Foreign God and is directly responsible for the Human Order Revision Incident that bleached the Earth and created the Lostbelts. Chaldeas summoned seven Disciples to help achieve its goals: three to monitor the Crypters (the Priest, the Atlas Killer, and the Incarnation of Evil), three to guide Chaldea (the Detective, the Professor, and the Count), and the last (the God) to serve as its vessel (according to the Count), Body Double, and leader of the Disciples allowing Chaldeas to complete its work behind the scenes without disturbance. Following the destruction of all seven Lostbelts, CHALDEAS due to taking Earth's surface and Proper Human History onto itself has become the Celestial Sphere for the Preservation of Humanity.It also turns out to have been the announcer that greets the Protagonist at the very beginning of the game.
 Villains
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Chaldea Security Organization Marisbury Animusphere | CHALDEAS Proper Human History Lostbelts Servant Universe Part 1: Observer on Timeless Temple Heroic Spirits Allies of the Beasts Others
Shinjuku Argatha SE.RA.PH. Shimosa Salem
Crypters Lostbelt Kings Alien God's Force Crypters' Servants Lostbelt Inhabitants The Twenty-seven Dead Apostle Ancestors Others
Paper Moon
Id Archetype Inception Trinity Metatronius
BB | Bestia Coccinea | Black Grail | First Lady | Testement | Ultra Heroine Z | Zouken Matou | The Master With No Name | Darnic Prestone Yggdmillenia | Kama | Space Ishtar | Xu Fu | Akechi Mitsuhide | Serizawa Kamo | Jacques de Molay (Foreigner)
 Beast Sodom's Beast (Bestia Coccinea) Heroic Spirits Nebuchadnezzar II
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