Stuck With A Demon.

"My name is Keaira Lunette, and I'm the Grim reapers daughter. My mother was a human. She died long ago. Had a disease called lung cancer I believe. I live with my father in the underworld at our kingdom, with demon servants. My personal servant is Vinicius Grace. His father is mine's servant. Well use to be anyway. He passed after the last war we were in, with the ancient knights. Demons and the ancient knights are great enemies. We've been fighting for fifty thousand years. "My Lady!" Hearing the alarmed voice I turn to the source. My velvet doors were then pushed opened. Vinicius stood in the doorway. "Yes, what is it?"
He was out of breath, with his black long hair sticking to his sweaty face. His yellow eyes shined. "My lady, we are under attack!" My eyes widens at this information. "Wheres father!?" I shout. "He should be on his thrown." His deep voice replied."

Keaira Lunette is half demon, and half human girl. Her father is the Grim reaper himself. But when he dies a brutal death, by the ancient knight Eremiel. Keaira, and her demon servant Vinícius are force to abandon their kingdom, and live in the human world. Even so, Keaira vows she will return to her land and kill the ancient knight Eremiel like he did her father.