"Ready?" Dean whispered to Sam as they stood either side of the wooden door, to which Sam nodded. Dean thumped on the door twice with his foot, breaking it down. When they entered, there stood a young girl of around twenty five. She was short, with long, curly red hair, and she wore a flowing black dress which stopped at her knees. The sleeves of the dress were tight round the girls arms, but this could have been because her fists were clenched. She was surrounded by men and women alike, all of whom looked weak, and many were in tears. Dean brought up his gun as quickly as possible.

"Hey!"

The woman swung around, looking at the brothers. Her eyes were an icy blue, and devoid of emotion. Dean shot three times; twice in the heart and once in the head. But after all shots were fired, the stranger remained standing, unharmed. The bullets had hit her. He was sure of it. But there were no bullet holes, the bullets hadn't gone through her and smashed something else. They just disappeared.

"You know, if you want these people alive, I suggest you don't try to kill me. 'Try' being the operative word, because you can't kill me but it's nice to show some respect.

"Who the hell are you?"

"Ania. Must you be so rude?"

"Y'know, I don't have much respect for demons anymore so"-

"For what? I don't…"

"Look, just tell us what you're doing." Sam said, taking a step further into the room.

"I'm not doing any"- Ania stopped mid-sentence and looked behind Sam and Dean, her face stone cold.

"Hello Ania." A deep, hoarse voice said from behind the brothers.

"What the hell is he doing here?" the girl exclaimed at Castiel, confused and angry.

"We could ask you the same thing." Dean interrupted.

"What are you doing to these people Ania?"

"Nothing. Just causing trouble." The twenty-something replied.

"Boy you sure know how to pick 'em Cas." Dean mumbled, before Ania retorted:

"I've got to agree with him there. Your genius boyfriend here thought he could actually kill me."

"I don't understand what she means Dean. I didn't think we"-

"We're not, Cas! How do we kill this bitch?"

"Yeah Cas. How do we kill me? Oh yeah. You can't."

"Why do you keep saying that?"

"I'm not real. I don't belong in this universe, so you can't kill me." Ania sang to the three men, nudging the people that lay on the ground with her feet. One mumbled slightly, but it was difficult to tell what he was saying because a lot of the noise was just moans of pain. She kicked him gently in the stomach with the side of her foot and administered a sharp "Shut up." And moved on.

"Yeah, we'll see." Dean snapped, putting his gun away, after realising it was no use.

"What do you mean not from this universe?" Sam inquired, to which the girl drew a confused look.

"You know…. Ania?"

"You know saying your name doesn't explain much." Dean inputted again. Ania darted him a look of intolerance.

"You should catch up on your studies Sam. I've got all eternity for you to figure it out. Or ask your angel buddy, I'm sure he'd be happy to help destroy me."

"And when we do"- Dean began -"we'll send you right back home to daddy before you know what hit you."

"You should go back to where you came from as now, and stop harming these innocent people." Castiel said in his monotone voice.

All of a sudden, Ania's eyes grew dark and the snarky smirk faded from her face. She stared the trio down. It took around five seconds, as Ania waited for one of them to take back what had just been said. Sam looked to Dean first, and Dean looked back shortly after that. Ania looked over to the men who had conceded, then back to Castiel, took a deep breath and leaned in so that she was face to face with him.

"Good luck." Ania sneered, then smiled. "With everything." The brothers exchanged confused looks, and before they knew it, Ania was gone. Leaving them curious and slightly nervous as to what she meant by 'everything'. The man that Ania kicked in the stomach groaned again, and managed to move a sufficient amount for the level of pain he appeared to be in two minutes ago. Then, a couple of others began lifting their heads and standing themselves up. Sam walked over to a boy around Ania's age and helped him up.

"Do you remember how you got here?"

"Uh, yeah dude. I've not got short term memory loss."

Dean sniggered from the side, and Sam ignored both the unnecessary comment and his brother laughing at him and continued on.

"So, what exactly did Ania do?"

"Well, she invited us in, it's her house. Where is she anyway?…. wait, how did I get better? I was going to die. I was sure I was going to die. And my family… oh, my family! What if they think I'm dead?"

Suddenly, the rest of the people in the room began reacting as the boy did. Panicking, worrying. Some cried, some looked distressed. Two girls even started fighting, so Dean pulled one off of the other.

"Hey! Knock it off! Now no one is going to die, no one is going to worry about their families."

"Now everyone, just go home. You'll be fine." Sam continued

Then, a scream came from the other side of the room. A woman was kneeling down, and for a second, Sam thought she had collapsed. But as the brothers got through the crowd of people, they saw that the woman kneeling down beside someone else.

Cas.

He looked dazed and a little taken by surprise at what had just happened. When Dean knelt down beside him, he looked up, confused.

"Cas? Are you okay?"

"Yes I'm… fine. Just a little dizzy is all."

Dean helped him to his feet, and once he was sure Castiel could stand on his own, Sam took Dean to the side, out of ear shot of the dizzy, confused man.

"Dean… what do you think happened?"

"He got dizzy, that's what happened. You heard him say it!"

"Yeah but maybe Ania"-

"Screw Ania. We find her, we kill her. Everything's going to be fine."

As the three of them left the house, Castiel felt a low, burning pain in his stomach.