It's the great pumpkin, Sam Winchester

Dean knocked on the door of Meg’s motel room. It hadn’t been that hard to figure out where she was staying for the time being. He figured if anyone knew where Cas was it would be Meg. He knocked again, harder.
“Give me five minutes” Meg yelled.
Dean frowned. What the hell was doing in there? Then he heard her scream and got the picture. “Eww” he mumbled. He looked impatiently at his watch.
Meg got off Cas and wrapped the sheets around her body, leaving Cas uncovered on the bed. She walked to the door and opened it.
“Hello, Dean” she said with a satisfied smile.
“I won’t be...

Anna materialized in Meg’s cell. Meg jumped up and crawled backwards. There was no evil bone in her host’s body that was considering on even trying to take the angel down.
“Don’t worry, I’m not here to hurt you. I have strict orders and when I’m done I’ll be gone” Anna said.
“Strict orders por who?” Meg asked.
Anna conjured her sword and Meg’s eyes widened in fear. But Anna cut her own arm and put the sword away again. She elevated to the ceiling and drew the Key of Solomon.
“Not again, come on!” Meg exclaimed. “I already promised Sam I wouldn’t get out until they’re...