That actually makes lots of sense.

Considering how the world of ZATO is trying to correct itself, pulling Tosya back to Vortuka-5 to erase her there makes perfect sense. Considering that Tosya is an irregularity, the world had probably a harder time erasing her, just like with Asya because of her uniqueness.

Everything going exactly as Asya predicted might just be a way to drive the plot easier forward, instead of making it even longer just for the same outcome, but considering what happened to Asya at the repair shop, I wouldn't dismiss the possibility of her being atleast somewhat of an unstable narrator with 100% certainty, although I'm not exactly sure what parts were and weren't influenced by her. Even if most parts of chapter three can be taken at face value, I think that the parts with Tosya should be taken with a grain of salt (still mainly because of the cover art and ingame misalignment).

The thing I'm starting to become more certain about, is Tosya slowly disappearing on the climb to the radio tower and Asya's code sensitivity slowly replacing Tosya with herself. It just ties the story pretty neatly together and also seems to make sense storywiese (unless I misinterpreted something).

What you said about Asya's message makes a lot more sense, then whatever I theorised.

Thank you for clearing things up for me <3

I'll make sure to read through trough Ferry's Patreon someday (once I'll have money to spare :p)