Summary: Callum and Belani are angels who fall from Heaven sent to aid the Winchesters in destroying Lucifer. (This most likely doesn't follow the whole plot of the show but I just got the idea and decided to go with it. Takes place right after Lucifer is released. Also, in this version Alistair is not dead).
Taken from our Father (1):
Vicksburg, Mississippi
CASTIEL
Castiel stood there, enticed in a verbal battle with none other than Alistair. Alistair, his new vessel being that of a middle aged brown haired man with icy cold blue eyes, chuckled at Castiel's request of Alistair giving up Lilith's location. Castiel had known it would be a long shot and a waste of time but he needed to give Dean and Sam Winchester just a little more time with their current situation-a hunting on five miles south from his own location-and that meant stalling. A lot of it. Castiel watched the demon in front of him intently, not prepared when the demon raised his hand and Castiel flew into an oak ten feet behind him. Grunting, Castiel stood, noticing Alistair was in front of him, and punched him in the jaw. Alistair, return swung a punch of his own. Castiel teleported fifteen feet behind Alistair just in time to avoid his fist.
Just as Castiel was about to run back into battle a thud to his right caught his attention. He looked over, noticing an unconscious and nude girl with dark hair. Sensing her, though it was faint, he could tell she wasn't human. Alistair, staring out of curiosity at the girl, must have sensed it as well. Predicting Alistair's next move, Castiel quickly used his telekinetic abilities to fling the girl out of harms way. Alistair appeared in front of Castiel and swung his fist, hitting him under his left eye.
"Lilith will like this girl." the demon began, a smile sneering his face, "I can smell potential from her."
Castiel punched Alistair in the mouth and teleported behind the girl. He quickly shed his trench coat and lay it across her before returning to the demon. Alistair moved quickly, teleporting behind both the angel and the girl. He gripped Castiel behind the neck and slammed him onto the ground, moving his hand to his throat. His gripped lightened when another thud was heard and both men looked to find another girl, this one blonde. Alistair, grinning, returned to Castiel and his mind raced with plans.
"Now we have two. Lilith will be pleased with me." he said, his grin widening.
Castiel choked, struggling to break free of Alistair's demonic grip. Suddenly, Alistair was off of him and getting off of the ground beside him. Castiel looked up to find the brunette girl wearing his trench coat and staring defiantly at the demon. Castiel's mind wandered, wondering who she was and how she did that. She was just some girl, right? But, he had seen stranger things. Alistair sent the girl flying into a tree. She hit the same oak Castiel had and fell unconscious. Castiel quickly punched the demon several times, hearing the familiar sound of an impala pulling up. Alistair blasted Castiel into the oak and he landed on top of the girl. Castiel heard the faint sound of Sam Winchester sending Alistair back to hell and his now dead vessel collapsing to the ground.
"What the hell are you doing here, Cas?" Dean Winchester asked, his tone accusing, "if we hadn't been driving by you would have been dead."
Castiel got to his feet and lifted the slowly awakening brunette into his arms. She'd been hearing a bit of what Dean was yelling.
"You should be glad that I was here. If I hadn't been, he would have surprised and killed you." he said, setting the girl up against the impala and walking toward Dean. "Give me your jacket."
"Why?" Dean asked, not wanting to shed his brown leather jacket.
"Just give it to me." Castiel said, waiting for him to give the jacket up.
Sighing, Dean shed the jacket and handed it to Castiel. Castiel walked over to the blonde and unconscious girl and lifted her to a sitting position to apply the jacket around her. He carried her to the impala and slid her in the backseat. He lifted the brunette into his arms once again and was shocked when her eyes opened once more.
"W-who are you?" she asked, her voice raspy as though she were dehydrated.
Looking at the Winchester brothers and then back to the girl, he responded.
"I am Castiel, an angel of the lord." he responded, waiting for the girl's reaction.
Her eyes widened.
"He told me about you when he, um, summoned me. H-he said I would meet an angel named Castiel and he would tell me who I am. About fallen angels. He said he and his friends Dean and Sam Winchester could explain." she said, staring intently, waiting for answers.
"A fallen angel? You've seen the lord's face?" Castiel asked, in shock.
"Yes and no. I-I didn't see him. I heard him. I'm not crazy." she said, wanting him to understand her situation.
It was silent for a moment. Castiel looked to Dean and Sam.
"Watch these two girls until I return. I need answers." he said, sliding the girl into the backseat along with the other one.
"No. No. No. We are not babysitting two brats. We have another case to do. No." Dean said, his mind set on not being stuck watching two teenage girls.
In the car, hearing his protest, the brunette rolled her eyes and set her jaw. Of course he wouldn't want to help her. The lord mentioned Castiel's help for a reason. He'd merely said Sam and Dean might be of some assistance. Of course. A big help they were.
"Dean, I need to see how important these girls are. I need to keep them safe while doing so." Castiel persisted.
"Absolutely." Sam interjected.
"Absolutely not, right, Sammy?" Dean asked, staring at his brother.
"No. We'll do it." Sam said, shrugging.
"Sam. Sam!" Dean groaned, "You've got to be kidding!"
It was quiet as Sam and Dean had a stare down. Castiel, noticing the chance, took this at his time to retreat.
DEAN
"Do you remember your name?" Sam asked, looking at the brunette.
"Callum." the girl answered.
Her name was the only thing she'd said to Sam and Dean. Dean, driving down the interstate, looked at her in the rear-view, finding her to be gazing out the window.
"How old are you?" Sam asked, hoping to spark up a conversation.
"Fifteen." she said, still not looking at either of them.
"What food do you like to eat?" he asked.
"I don't remember," she said, her voice rising as she finally laid her blue eyes on him. "I don't remember and neither of us really care. Just tell me when Castiel's coming back."
Dean looked at his brother, neither of them having an answer.
"We don't know." Dean finally said, earning a huff of exasperation from Callum.
"Just great." she chuckled sarcastically.
To her right, the blonde girl started moving. She opened her eyes, revealing emerald green eyes. She held her head as though it hurt. Callum focused her pale in color but dark in shade blue eyes on the girl and smiled. Dean raised and eyebrow at Sam who just shrugged in response.
"You okay?" Sam asked the girl.
"Yeah, my head just hurts." the blonde responded.
"I'm sure they have some sort of pain medicine." Callum said, "what's your name?"
"Belani." the girl said, catching a bottle of pills Sam had tossed to her.
"I'm Callum. How old are you?"
"Fifteen." Belani said, swallowing down two pills.
Dean and Sam exchanged another look and waited for the two girls to converse more.
"Me, too. When were you born?" Callum asked.
"I-Th-That I don't remember." Belani responded.
"Me either." was the only reply Callum could come up with.
They sat in silence for a good thirty minutes until Dean's stomach growled.
"Are you girls hungry?" Dean asked.
"Yes. What was this case you were talking about with Castiel?" Callum asked.
"Castiel? Who's Castiel?" Belani asked.
"An angel of the lord." Callum said.
Belani's eyes widened as though she'd remembered something.
"The case is a ghost haunting in a house in Illinois." Sam responded.