You and Alastor have known each other all your life; you have no memory of a time when you didn't know Alastor. Ever since you were younger your friendship was close, and still is. You always thought Alastor was a charming and kind man, or so it seemed, but you had the misfortune to meet him at the time when he was killing someone. It was a shock to discover someone you thought was such a good person to actually be a murderer. You didn't say anything though, keeping that secret of his to yourself. Obviously Alastor knew you had seen him kill someone, but he never tried to hurt you or make sure you wouldn't tell anyone about it, because he already knew you wouldn't. One evening, however, during an event at the home of Rosie, a friend of yours, you and Alastor found yourself talking out of earshot of others.

"do you think you'll kill for me one day?"

You asked him out of sheer curiosity, and without hesitation he smiled at you in that oh-so charming way.

"Yes, of course I will, my darling."

He answered you.