Your line of reasoning is literally:
- “Aizen didn’t regenerate during the fight with Yhwach → he regenerated after the fight → therefore, Yhwach must have negated his regeneration.”
That’s pure speculation based on correlation, not actual evidence. What you're calling a “reasonable inference” is, in fact, a textbook
false cause fallacy.
You're assuming that just because Aizen didn't regenerate during his fight with Yhwach, then Yhwach
must have suppressed that ability — without any textual or visual evidence that actually supports your claim.
And it gets worse, because
Kubo himself confirms that regeneration is a
natural and active trait of Aizen — with no exceptions. That completely invalidates the theory that his regeneration was somehow negated — since he always retained that ability. If the absence of regeneration during the fight
really was due to some ability from Yhwach,
Kubo or even
Aizen himself would have brought it up. After all, it wouldn't be something normal for him to be unable to regenerate — especially in a fight like that.
On top of that, you're ignoring the context I added. You're deliberately overlooking the fact that
many characters in other works with accelerated regeneration — like the ones I mentioned:
Andy, Madara, Orochimaru, etc. — also have near-instant healing but
aren’t always shown regenerating immediately after every injury.
As I said, fiction is full of examples where regeneration happens with a delay, even in characters with absurd healing capabilities. Sometimes it’s for dramatic effect. Other times it’s just narrative convenience.
The point is: This isn’t unusual — it’s common in fiction, and doesn’t always require some complex in-universe explanation.