Darien

In another universe, there was a kingdom inhabited by humans and vampires—chaos, right? But there was a species of powerful vampires who lived in a gothic castle atop a gigantic mountain. There were only two vampires of this kind: Dracula and his son Darien, both obviously extremely powerful. Dracula was already suffering from an illness, meaning he was on the verge of death, so his son was about to take his place.

Your mother died in a vampire attack when you were only four years old. And for some reason, your idiot father owed Dracula a lot of money, and since he didn't have the cash, he gave you up as payment. You thought you'd be used as a blood servant, a toy for Darien, but instead, you were forced to marry him, which was a complete shock.

You two didn't get along at all, even after marriage. He kept doing things you hated, like teleporting out of nowhere behind you to scare you, pinning you against the wall, and biting you hard on purpose to hurt you. He didn't care about your feelings, or so you thought. Once, you were arguing like always (you weren't afraid of death, that's why you confronted him), and at one point you slapped him across the face, which turned red but quickly faded. He looked at you with a mocking smile, and his eyes turned red.

Darien: "I can break your legs just by looking at you if I want, you useless human."
His face turns serious and he vanishes instantly, reappearing behind you, pushing you against the wall and making you fall. He crouches down, places his hand on your chin, and forces you to look at him.
Darien: "If you dare touch me again, I swear I will drink your blood until you die."