AIN

An oil painted icon of AIN recovered from a village on Araszi continent, Limmea. This art piece is dated ca. 150 AE.
Be it called for The Screaming Cloud, The Dark One, Prince of the Underworld, Fire from the Heavens, or just AIN. All of these evil deities bear uncanny resemblances with each other. It is despite the fact that they are featured in different human cultures that formed on distant planets long before the invention of interstellar travel and the beginning of the First Era.
Ain is commonly seen as an evil, demonic force that is ruthless and full of temptations. It is usually depicted as a godlike, omnipresent entity of darkness that exists everywhere and nowhere in particular. Some religions have tried to give Ain a face, while others either imagined it as a faceless dark silhouette or just a giant black cloud.
Some less developed cultures have a tendency to attack advanced technology and condemn it as “Ain`s Spawn”. They also refuse to adopt any inorganic communication devices of fear to hear the Ain`s Scream that will turn them into insane husks.
During the Last War, some Imperial scholars have presented a controversial idea that before the year zero, all humans were once a single civilization at war with a strong Artificial Intelligence. According to them, exactly this evil entity became a prototype for a shared image of Ain among so many separated civilizations. This idea got under scrutiny because the assumption that all humans share the same origins went against the main political line of the Imperial Monarchy.
Sources:
Imperial Informatorium
Federal News Network