The reason she doesn't have memories of her father
Spoiler!
Because the shock she suffered after she saw her father die infront of her. She kept screaming and then fainted eventually and then lost her memories due to trauma
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 