I'm guessing the intent is to set up something similar to Corrupted Kingdoms, where the MC is supposedly under the thumb of a powerful entity but is still able to take independent action and eventually buck said control.
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Although I wasn't directly inspired by Corrupted Kingdoms (which I wasn't familiar with until now), I find the comparison interesting.
Actually, the idea behind the story came from mixing elements of an old anime that struck me with some original ideas I wanted to explore. It is always fascinating to see how everyone interprets the prologue and what they associate it with. I hope that as the story continues, it will reveal unique nuances to what you expect!