AU: I've decided not to do these in order, but each chapter will have an episode tag. I will place them in order, so the episodes correspond. Thanks so much to everyone who has viewed, favorite, or followed!

4x01

She knelt at Bobby's side, checking his pulse as Dean worried over them. Her brother crouched between her and the newcomer, always protecting her. "Your friend is alive," the stranger assured them.

"Who are you?" Dean demanded, looking up at him.

"Castiel," the man replied.

"Yeah I figured that much. I mean, what are you?"

"I'm an Angel of the Lord."

Kim looked up worriedly as Dean rose to his full height. "Get the hell out of here. There's no such thing."

The smirk and the tilt of the man's head had Kim watching carefully. He was confident, with a superiority complex, but he stood like a soldier as he faced her brother. "This is your problem, Dean. You have no faith." With a crash like thunder, light exploded in the dark barn, and Kim fell backwards. She stared as the wings appeared, and the shadow took up the far wall of the barn. When the light went out, she stayed silent, eyes burning with tears.

"Some Angel you are. You burned out that poor woman's eyes," Dean snarled, still as cold as he had been when they started.

"I warned her not to spy on my true form. It can be overwhelming to humans. So can my real voice, but you already knew that," Castiel explained, stepping closer.

"You mean the gas station and the motel. That was you talking?" When Castiel nodded, Dean snapped, "Well buddy, next time, lower the volume."

"It was my mistake. Certain people, special people, can perceive my true visage. I thought you would be one of them. I was wrong," the angel replied, then turned to look down at the girl still kneeling on the floor. "It is not you, but your sister who can truly see me."

Kim stared up at his rather attractive face, eyes narrowed as she tried to see through the light coming from him. Getting to her feet, she stood at Dean's shoulder and said, "I knew I heard a voice at the motel. Plus, you're glowing blue."

"And what visage are you in now, huh? What, holy tax accountant?" Dean growled sarcastically.

"This? This is a vessel." Castiel looked down at the trench coat and suit as he spoke and Kim sighed.

"You're possessing some poor bastard?" Dean demanded.

"He's a devout man, he actually prayed for this."

"Look, pal, I'm not buying what you're selling so who are you really?"

"I told you." Kim almost laughed at the confusion on Castiel's face. He didn't understand why Dean thought he wasn't telling the truth.

"Right. And why would an Angel rescue me from Hell?"

"Good things do happen, Dean," Castiel replied, stepping closer. Now Kim saw that he really was smaller than Dean, maybe only an inch taller than her.

"Not in my experience." At that, Kim set her hand on Dean's arm, because it was true. Good things just didn't happen to their family.

"What's the matter?" the angel asked, eyes searching. Kim's hand tightened on Dean's arm when he leaned forward and realized, "You don't think you deserve to be saved."

"Why'd you do it?"

"Because God commanded it," Castiel told him, eyes flicking briefly to Kim before he added, "Because we have work for you."