beta
I just realized something after a re-read. Sion was only 10 when he died the first time, then woke up in the body of an 18yo. He's still mentally 10, then lived for two more years after that before exacting his revenge and regressing with Lila. It means he's basically still a kid in an overpowered body at the time. He has little control over his feelings because he's barely a teenager mentally. He only wants revenge and nothing can stop him. Not sure about the next couple of times when Lila dies early after her regression, but I'd guess that Sion also just returns with her and has only "lived" as long as Lila had those times. More or less, if he dies at 10 each time during those first regressions, he mentally ages only two years at a time. I don't remember how many times they went back, but at a rough guess, I'd put Sion's mental age at 18-20 by the time Lila decides to help him and the main story starts. I know this doesn't justify how many times Sion killed her. It just really struck me when I realized he's still a kid who's yet to grow up and begin to even try overcoming his traumas. Between them, Lila's the one who's been living longer and thus more mentally advanced of the two, so I hope she realizes all this later on and works it out from there.