What drove the Sirens even crazier was that the few META Ship Girls who had survived the great catastrophe of the original Alpha timeline had also developed the trait of uniqueness.
Even in timelines capable of producing Ship Girls, no corresponding normal individuals from the past could appear for the surviving Ship Girls who had already become META.
The series of changes caught the Sirens completely off guard. After learning of this, Enterprise, who had already become META, merely left the Sirens with a single indifferent remark:
"Perhaps... we ships were never meant to exist."
As for the Sirens' proposal for cooperation, asking the META Ship Girls to participate in their experiments, Enterprise refused.
She did not approve of the Sirens' practice of wiping out a world once an experiment ended or failed.
"Argh! Why is that girl so damn stubborn?!"
Thinking of this, Observer nearly went mad, viciously clawing at her hair before finally letting out a breath.
Since the uniqueness issue of the Ship Girls could not be resolved, the Sirens had no choice but to find another path. While carefully protecting the experiment site where the problem had first appeared, they began interfering with the histories of other parallel-world experiment sites.
As for the world now known as the Beta Experiment Site, a string of reckless maneuvers by the Sirens had sent its history down an entirely different path.
Whenever a fierce conflict was about to erupt within that world, the Sirens would leap out to play the villains, forcing the entire world to unite against them.
This successfully prevented the major factions of that world from becoming as bitterly hostile as they had been in the original history, but the Sirens had also gradually driven themselves into opposition to everyone.
But they did not care.
They