In 2048, 15,000 humans were selected by the United Earth's artificial intelligence Omni Electio to evacuate the Earth aboard two interstellar immigration ships, the Aratrum and the Oratio. 5,000 passengers boarded the Aratrum, which was bound for the planet Tau e in the Cetus constellation. Because Tau-e was projected to be closer to Earth than the Oratio's destination, the Aratrum was not equipped with hypersleep pods. When the Aratrum arrived at Tau e after 22 years of travel, its number of passengers had dwindled to 4000 due to diseases and other hardships, while contact with the Oratio was lost. Tau e was found to be uninhabitable for humans, so the Central Committee chose to attempt to return to Earth. When the ship arrived, they discovered that at least 10,000 years had passed on Earth and that Godzilla was still alive. The Central Committee approved Captain Haruo Sakaki's plan to disable Godzilla's Asymmetrically Permeable Shield and destroy him using EMP Probes, and appointed Colonel Eliott Leland to lead the mission. Many Landing Ships aboard the Aratrum were then deployed to the planet's surface, where humanity would fight one last desperate battle to reclaim its home from Godzilla.
Following the destruction of most of the Earth Landing Brigade at the hands of Godzilla Earth, the Aratrum received a panicked transmission describing the situation. Lieutenant General Halu-elu Dolu-do wanted the ship to retreat to the Moon's orbit lest Godzilla detect the ship and destroy it with his atomic breath, but Endurph and Takeshi J. Hamamoto opposed this on the grounds that there could still be survivors on the Earth. Admiral Unberto Mori declared that if no signs of survivors were detected after 48 hours, then the ship would abandon the Earth. Just before the time limit was reached, Haruo Sakaki and the surviving troops made contact with the Aratrum, and expressed their intention to seek out the remains of Mechagodzilla and resume their fight against Godzilla. Corporal Marco Ghione and two other soldiers returned to the Aratrum in a Landing Ship, while everyone else journeyed to the foot of Mount Fuji and discovered Mechagodzilla City. After communications were established between the Aratrum and the City, Mori contacted Haruo to attempt to convince him to return to the ship. Haruo broke off communication, saying he was ready to answer for whatever rules he broke. Hamamoto later informed Mori that the Exif and Bilusaludo aboard the ship were all suddenly in favor of traveling to Mechagodzilla City to support the operation against Godzilla. This never came to pass, as contact with Mechagodzilla City was lost shortly thereafter.
After Godzilla Earth conquered Mechagodzilla City, the Central Committee listened to the last transmission from the area, containing a dialogue where Haruo refused to allow Mechagodzilla's Nanometal to spread, allowing Godzilla to survive. Bilusaludo chieftain Halu-elu Dolu-do took this as an act of treason, sparking an argument over the Bilusaludo's true intentions with the Nanometal. Later, the Bilusaludo on the ship staged a mutiny, insisting they would not allow the ship's main life support systems to stay online much longer unless Haruo was appropriately dealt with. In response, Haruo went into hiding with the Houtua. General unrest and panic gripped the remaining inhabitants of the ship, though Endurph established a religious following similar to that of Metphies aboard, which pacified some. Both Metphies and Endurph later began a sermon simultaneously, and as Metphies' followers began their sacrifice to Ghidorah, a singularity formed next to the ship, much to the confusion and panic of the crew. As Ghidorah began emerging from the anomaly, it coiled around and damaged the ship while the crew took up a disjointed attempt to restart the engines. This proved futile, however, with the engine exploding and the remaining crew's sense of time impaired due to Ghidorah's presence. Eventually, Mori and Hamamoto could only scream in terror as Ghidorah crushed and destroyed the ship, killing all its inhabitants.
- Can carry up to 5,000 passengers.
- Possesses a subspace navigational system that allows the ship to instantaneously jump light years ahead. However, using this system to cover extremely large distances is risky and restricted, as doing so runs the risk of causing large deviations in the ship's destination. The hyperdrives also caused the Aratrum to reach Earth after 20,000 years had passed there, even though the journey was instantaneous for the ship.
- Can deploy Landing Ships to a planet's surface.
Earth seen from Aratrum concept art
The members of the Central Committee look at the Earth from the bridge of the Aratrum
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