
What will happen to other princess i forgot the name

Who knows, in the novel she gets banished, because at the end of the day she's not human (creature made out of dark magic) and is a liability to Claude and Athy, plus she was a selfish brat.
Since the one who adapted the novel is such a jenette hoe and tried to force us to like her (practically cut out heavy character development for Athy in order to give 40+ chapters of focus on jennette), who knows what she'll decide to do with Jennette. Wouldn't be surprised if she tries to shoehorn jenette into the picture and have her stay with the family.

I hate that she always misunderstanding her father

Uh she has good reason to misunderstand him since ignoring a human being for over a decade would clearly hurt them (she was reborn as Jubellian long before she got her memories back after all, plus she read the novel. So even without experiencing the exact same events in the novel she has *very* good reason to distrust and misunderstand him. Obv.).
Cant wait for the next chapter