While reading this chapter, I was still wondering who might've been the other party in the time-reversal magic.
1) Cosette is suspicious, as usual, but it doesn't make much sense. She has the ability to copy/steal powers, or something like that, from what I've gathered. This part is still blurry. Then again, she's a psycho and I don't want to pretend to understand her.
2) Sir Joseph. Then again, even though he was loyal, he wasn't on that good terms with her in the past timeline. So maybe not.
3) Maybe it was cute lil bro. He had tried to help her, and he loved her the most. And he would think that it would be more beneficial for her to retain her memories and try to prevent the same thing happening again, than him remembering.
Still not sure why the magician did what he did. Maybe lil bro contacted him in the past timeline?
I think lil bro is the most likely possibility at this point. Even if her father did regret what happened, which I highly doubt seeing that they were at odds in the past timeline. So. Lil bro.
Even if he wasn't the one who did that, he's just so cute, I want a little bro like him!