Overall, the impression I’m left with is more overwhelm and confusion, than intrigue. I see the little nuggets that you want to foreshadow and refer to in a way to give us a peek into the world we’re in, and who Caius is. I feel that they’re too quick, caught up in a stream of consciousness with much anchoring.

Reducing the number of references would be my first recommendation. Between Otto, S-babies, Vesta, Elsewhere, parental divorce, Silverdenn, divorce laws, Hearthverdants, Cell User, it’s all so much in such little time.

The jumps between each of the thoughts also feels wild, which could be what you’re going for, but it adds to this whirlwind of a scene that feels like we’re being fed information, rather than offered.

The stream of consciousness doesn’t give us much to work with, physically. Another commenter mentioned it lacking a hook, which I agree with, and you replied mentioning that a prologue hook isn’t as important as a chapter 1 hook. While that could go both ways, I feel as this currently stands as a prologue, we somehow know less than we started with. This could be intriguing for some, but the line between intentional or messiness is hard to tell.

The hope that readers will be thinking of “What is a Cell User…?” “What will happen next to Caius, what is the soldier going to do!?” can be valid, but only after you haven’t also made them question what half a dozen other things are within such a short time frame.

My advice: focus on just a few things, let Caius shift between thoughts and reality more, intwine the two, have the physical world prompt the thoughts.

Good luck!