beta
i think that the grand duke has always stayed distant bc he is the head. he actually loved keira but didn't realize it. That's why the father never blinked when everything happened but started to regret it once she died. He made the magician turn back time becausekf the regret. H emay or may not have realized cosette's schemes. and most likely, cosette is actually the second daughter. its shown in that diary that the YOUNGER awakened first and onlu after a few years after resonance did the eldest gained her ability.
i personally hate cosette but maybe there was a scheme to why her mom was said to never had a child. im thinking that this is related to Keira's granddad.