Io

Regardless of what happened when the unusual creatures came to Earth from the Plane of Dreams more than 10,000 years ago, they all forgot their hometown and everything in the past. The same applied to the sirens. Hao Ren could imagine the scene in the city back then: Nasaton fell through the huge spatial rift, crashed down to the bottom of the Pacific Ocean, and took root in the deep sea. When the sirens woke up in the "unfamiliar" starship city, they were confused and helpless. They did not know who built the city, or the true functions of the city. They only knew everything was as it was when they woke up. Today, their greatest achievements were only having mastered the life-support system, part of the defense system and maintaining them. They knew nothing about navigation, flight, and the navigation databases of the starship city.