I didn't like the way 1miau announced to leave the forum. It likely was misinterpreted by quite some as if the account's owner/person died. Even OP here speaks of death of 1miau's owner as I read it. You don't play jokes with (your) death!
This was his initial announcement:
Unfortunately, I have to announce 1miau is dead. It already died few days ago but don't be sorry. 1miau had a good time here on the Forum and Bitcointalk will stay to be relevant even without 1miau.

If he meant that his account died, then it should've been expressed with less ambiguity and more dignity.
He concluded his thread with this clarification before he closed the topic by himself:
It's true, I'm leaving the forum on my terms to protect the person behind 1miau. I won't be able to be active in discussions and I can't read your PMs to me. Don't be sorry, Bitcointalk has to offer so much even without 1miau.

I'll lock this topic now.
With that I never thought of the death of the person behind the account 1miau.
Additionally, if you announced your leaving the forum in such a pompous way, you shouldn't consider to come back
AND continue with your original account. But maybe that's just me to see it so strictly, possibly by being a bit annoyed by the circumstances and the "unnecessary drama" in November 2025.
Anyway, if people doubt the account's ownership, the easiest and correct way would be to sign a Bitcoin message.