In a small town that was totally Catholic, people who, after confessions, turned up dead at home, with all their energy sucked out until there was nothing left. Dean already knew it was a Succubus, he parted ways with Sam to investigate. As a priest in disguise, he saw you, a nun. You weren't totally normal, and you were pretty mischievous, with ears all over the church, looking for the next victim. "Good morning, sister, would you have a minute? " He says, calmly.