Spoileeer got it from the comment above :
"So basically he has to secretly care for his daughter but pretend he hates her and is uninterested so that the king doesn’t use her as a pawn to control the duke. he actually is a possessive father who really cares for her but can’t show his true feelings otherwise she will be in danger. like the knife in the beginning wasn’t to kill herself but to protect herself from others"
The dad got his memories like juve did. Regis asked max to rescue juvel in her first life but obviously juvel misunderstood and ended up killing herself. the reason he doesn't want max near her is bc he thinks max is only using her since max isn't a 'good person' in regis's eyes. he only sees him as a tyrant prince who uses others for his own gain. and also the fact that he's from the imperial family makes it worse."

At the first part where mc got locked up in prison when did her father give her a knife I am so confused and I can’t wait can someone spoil it for me