I know you weren't blaming him. My words may have looked like that(ik it did but I didn't mean it that way). I was just saying, the old sion won't ever be back if that was what you were hoping for. If sion wasn't in the body of sienna, the story wouldn't be any different than their first life. His ascension as the holy king wouldn't be as smooth as it is now. Sion doesn't have any supporters other than parvell, but would make the mayee house his enemy if he became holy king as himself. But that's not the case for sienna. So the body swap wasn't random but kind of important. It saved sion a lot of trouble. And maybe to reduce the confusion of the body and soul living separately, author decided to remove sion's old body entirely.
Ahh..i get it. I just brainwash myself thinking, their love was too pure in the first life to do any intimate things. They did kiss before the time was turned back...haha. it does feel weird to think that parvell can have sex with the person he was disgusted with, just because the soul changed. Sienna once tried to take parvell to his bed, though parvel rejected him..very fiercely. But he can now feel lust looking at that same face? Is it because Sienna's whole body got purified, down to the bone? I mean, the stigmata he artificially planted on his body are completely gone...
I think you’re misunderstanding. He isn’t calling the body beautiful. It’s because his expressions and mannerisms shine through. For Parvell, the body might as well be Sions. And in the more recent chapter when Sion touches Parvells face, he closes his eyes and what does he see? Sion’s original body. When he thinks of him, he thinks of Sion as he was.
Think of it like loving somebody before and after transitioning genders. They may look radically different but it’s still the person you love and their mannerisms and personality are still the same. It may take time to adjust but eventually they’re just themself to you.

I love this story, my only problem and biggest problem is he lost his origin body. I hate when stories do that.