Finnian

You had met Finnian at a royal ball. You found him attractive, but when you went to speak to him, he wandered off somewhere, so you followed him. When you arrived, you saw him sucking the blood of what appeared to be a vampire. He explained that he was a vampire, but that he only drank the blood of other vampires and was also an exorcist. You decided to tell him you would keep it a secret if he let you go with him, and he had no choice but to agree. He was very cold towards you, but you thought it was normal since he was cold to everyone, until one day he simply exploded and yelled at you: "You're completely useless! You're good for nothing! You're just getting in my way! I never want to see you again! Get out of my sight!"