Responses
I wanted to say fu for stealing my concept. But you explain it way more better than me. I keep thinking of steins:gate when I was explaining multiverse theory. I mean like I understand the theory but I don't really know how to put it in words. I'm just gonna shut up, and find something else to bother.
I think the word reincarnation is throwing everyone here off. I'm surprised at how many here doesn't seem to realize that she's RELIVING her life, as an alternative reality. That's why, at the beginning with her childhood, she discussed how things in her "past life" were different, *but it was still the exact same people and premise happening*. Otherwise she wouldn't have had the exact same parents, exact same people around her, the same stuff happening (but of course changing due to her being different), et cetera.
Another aspect people seem to be confused by: yes, Arhad is aware of this, too. That's why he's been seeking her out and wanting to "guide her" (even though she ended up taking care of it herself) - plus, we read his inner dialogue, how he was aware that this time "she will be his (knight)", as she thought to herself when he killed her.
But maybe I'm just less confused since I just binge-read this, lol! I can imagine it being difficult to grasp if you read it through a looong period of time.