Endless possibilities of affection

[KNY x Ubuyashiki!reader] You were born as the eldest daughter to a special family of renowned and historical lineage. Kagaya Ubuyashiki, your respected father, held the position of the head of the demon slayers, while your exalted mother, Amane Ubuyashiki, was a former priestess.
But the Ubuyashiki family had never seen a daughter like you. Despite being a daughter, you had inherited your father's appearance and with it, the mark of death that afflicted all male heirs. But you were also blessed with the Ubuyashiki family's unique ability on a far more powerful level-the gift of foresight. Intermingled with this heavy curse of death was something you considered a blessing. A blessing to aid the demon slayer corps with your life.