Can someone spoiler

I’ve heard that he doesn’t but he does disappear and never to be seen again at the end ?

I think just dying would be too easy of a punishment. He should suffer in the most gruesome way before dying.

Spoiler
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Iirc, in the end, he plans to end his life after exposing the corrupt kingdom and essentially ending the monarchy and nobility but Lorena indirectly lets him know she doesn't give a shit about him but also that she doesn't wish for him to die (she sends his dog to him, mirroring how he always sent it after her to find her)
So ig he does live on with the realization he fucked up big time and should've cherished Lorena because in his own way he truly did love her, only he realized it too late. Also, Miguel and Lorena were simply meant to be.

Thank you

(⌒▽⌒) no worries

Question.... Does he ever learn that his staff mistreated her too? Do they ever really hash everything out?

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No, that's never discussed in the story. He leaves that mansion and most of his assets to her, iirc. The staff were probably all let go of.

They don't hash anything out either. She doesn't want it and never lets him explain away his behaviour. He tries to but he doesn't push it too much...he's too proud ig. Valle/Vaye remains almost an enigma until the very end.