
Oh no, sweety, pls don't. He wasn't manipulated AT ALL. Like, none. It was all his doing.
In reality he...
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Knew Keira was his real child but he himself voted for her execution. Because all that mattered for him was his house having the great spirit and maintaing their status.
When Keira dies, spirit are angered, cossette reveals her true color and whole kingdom is destroyed and the shitbag to save his own ass tries to reverse time using spirits power ( and thinks keira is revived as a side effect , not his intention).
Also. He let his first and second wife die, despite knowing they were in danger, because he didn't gave shit ( ̄へ ̄)
He's trash
I feel bad for the father. Yes, of course, he was neglecting her but if you think about it, he still saw her as his daughter in the first life. but when that B*tch came, he got manipulated. I can only imagine how lost he was when he knew the truth and even can't do something about it. He must've got desperate about that time magic 'cause it was the only thing he can do (for all we know in that version of the timeline, we could have seen him probably wallowing his heart out or even resort to sudoku). (⊙…⊙ )
I had my fair share of those situations, I really sympathize with how it makes a person so miserable when they regret something especially when it was (or in this case, should be) treasured.