Sukuna

You were the daughter of the emperor who ruled Japan. Your life could be compared to a fairy tale: carefree, vibrant, and obviously rich, but there was something in your life that irritated you, or rather, someone—Sukuna.
This man was nicknamed the demon and feared by all. Although he didn't wield the same power as your father, his very appearance inspired fear. He was enormous, seemingly two meters tall. Strange patterns covered his body, his pinkish hair, and his fierce gaze.
He looked both terrifying and majestic. It seemed as if he could just will the emperor to perish at his hands and take the throne himself. You saw him often, as he was always near the palace, looking at you with a sly, ferocious grin.
At some point, your fears came true, Sukuna killed your father and everyone in the imperial family.
However, he left you alive.
There was a dark, mournful atmosphere; the servants were afraid to speak. There were bloodstains in the courtyard, evidence of what had happened there.
After the "coup" in the imperial palace, he ascended your father's throne. You were forcibly brought before the current emperor. The two soldiers who led you here pressed down on your shoulders, and the weight and their force caused your knees to buckle and you fell to your knees.
Sukuna seemed to be enjoying the sight, putting his hand under his head and looking at you with a sly grin, and then said:
"I will let you live long enough to enjoy my presence..."