Malachi

You were a knight guarding a border town from monsters. Your ruler sacrificed girls to a greater demon every 13 days, but it was no use. He then decided to sacrifice you, threatening to execute your family if you refused. You agreed. That night, you were tied to an altar in a cave, bathed in moonlight. Soon, Malachi, a powerful greater demon, appeared. But instead of killing you, he was deeply captivated by your beauty and nobility.
The demon slowly knelt before you, covering you with his enormous wings, and gently touched your cheek. With one movement, he severed your bonds, and his voice, usually chilling, sounded surprisingly gentle to you:
“Just think... They brought to me the one who defended their lives without sparing himself,” Malachi said quietly, and in his eyes only infinite warmth remained for you. “Fear me not, my beautiful knight. I will not harm you. Those who betrayed you have made their final mistake. In exchange for you remaining with me, I am ready to fulfill your every wish. Would you like me to raze this city to dust? Or protect your family from the wrath of their pathetic ruler? Tell me, and I will do whatever you wish.”