Disclaimer: I don't own Dean, Sam, Castiel, or any of the other characters that have previously been on Supernatural. Let's face it, if I did own them, I probably wouldn't be writing fan fictions. They belong to Kripke, who rocks. However, all the new characters, such as Brielle, belong to me. :D

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Most of the what was so far a five-hour ride was spent in silence, the enormity of the recent events too much for any of the boys to know how to act.

Castiel sat in the back with his eyes closed, causing the boys to wonder whether or not he was asleep.

The boys sat in the front, with no music playing, just an air of animosity between them.

Finally, Sam, being who he is, decided to break the silence.

"Dean, I'm…"

Dean, however, raised his hand to cut Sam off.

"Sam, no. I don't want to hear it. No chick flick moments, alright. Look, you screwed up. But, I screwed up first. Had I not broken the first seal, you wouldn't have broken the last one. I know you're sorry. And, we'll figure it out."

"You're not mad?"

"Sammy, you picked a demon over me. Of course I'm mad. And things are gonna be different between us for a while, maybe even forever. But, you're still my brother, and we're gonna stick together and see this thing through."

Sam sighed, glad that things were as okay as they could be between him and his brother. "Thanks Dean."

He looked back at Castiel, eyes still closed, holding Brielle in his arms.

"Do angel's sleep?" Sam whispered.

Dean shrugged his shoulders. "You tell me, research boy."

"No, we don't sleep. I was merely praying." Castiel said, sounding slightly annoyed, as his eyes fluttered open.

"Well, if you're done, we'd really like to know a little bit more about Brielle." Dean motioned towards the girl.

"That's only fair. You have a right to know. I'll tell you what I can, but there are some things she must tell you herself."

The boys nodded, showing their understanding.

"Brielle is the daughter of Eva McAlarney, who came from a long line of hunters originated Ireland. Eva is actually an English version of the name "Aoife", who, in Irish lore, was the greatest warrior of all time. Eva's father, Gabrielle McAlarney, moved to America when he was 18 to begin hunting in this country. He met Eva's mother, a fellow hunter from Scotland, and after they were married, they had her."

Dean glanced at Castiel through the rearview mirror. "Cass, not that I don't appreciate the history lesson, but can you please get to the part about Brielle?"

Castiel shot Dean a threatening look.

"Eva grew up a hunter. Her family was killed when she was 18. She kept hunting, the deaths of her family actually strengthening her resolve. She quickly became one of the best hunters in the Midwest. Every hunter around knew of Eva McAlarney."

Sam looked at Castiel. "Wait, wasn't she from Illinois?"

"Yes, she was."

"Dad mentioned her in his journal, didn't he?"

Dean thought silently for a moment then nodded. "Yeah, I think so. But, I don't think it said much, just that they hunted a few demons together in Kentucky."

Castiel continued. "Eva hunted for many years until her and another hunter had a brief relationship, which resulted in Brielle's conception. When Eva found out she was pregnant, she decided to step away from hunting so she could raise her child and keep it safe. She delivered Brielle, and they lived a safe, normal life, for six months. But, the demons then discovered where they were, and attacked them. Eva was fatally injured, but managed to get out of the house with Brielle. She managed to hide in the woods, and, with her dying breath, prayed that God would save her daughter and give her the strength of an angel. God answered her, and sent myself and Michael to save the child. Michael gave Brielle some of his grace, and she was raised under my care."

"Wait, you raised her? Why didn't you guys just take her to her father?" Sam questioned.

"Her father was never informed about Brielle, and he passed on a few years ago without learning of her."

"Cass, I have to say, that's really crappy, never letting someone know they have a kid out there. You should have told the poor guy." Dean reprimanded.

"We couldn't tell him. It was ordered. It would not have been safe for the girl. She is part of an ancient prophecy, so we could never let the demons know about her, or they would have killed her. Had we told her father, there was a greater possibility of the demons becoming aware of her existence. So, I was responsible for raising her and keeping her safe from the forces of darkness."

"No offense Cass, but it doesn't really seem like she needs the protection. She seems to be able to take care of herself pretty well." Sam noted.

"That was not always the case though. Brielle has developed her skills through years of training. And she still does need the protection. Although she has angel strength, she doesn't have a lot of other angel abilities. She can only fly very short distances, and heal very minor injuries on other people. And she gets hurt like a regular human. So if she were to be shot, it'd be the same as if any other 18 year old was shot."

"Why don't you just tell everything you know Cass." Brielle groggily mumbled from the backseat.

She slowly sat up, looked from Dean to Castiel then back to Castiel, glaring at him.

"I know you're upset, Brielle." Castiel gently said.

"Darn right I'm upset." She said, crossing her arms and leaning into the back of the seat. "He's driving my car."

Dean laughed at her, as Sam smiled. "Wow, if I didn't know any better, I'd say her and Dean were related."

Both Brielle and Castiel glanced at each other in the backseat, while Brielle tensed up. "Yeah, wouldn't that be something." She muttered then looked at her surroundings. "We're almost to my house. Turn left at the next intersection."

The boys, not catching the exchange between Castiel and Brielle, nodded, as Dean followed Brielle's instructions.

About 5 miles up the road, Brielle gave them further directions. "Turn left here."

"Here? There's no driveway or road or anything. Just a bunch of overgrown brush." Dean informed her, thinking that maybe she was still a little too tired to understand what was going on or where they were.

"I know." She smiled and raised her hand, moving it to the left.

As she moved her hand to the left, the brush also moved to the left, revealing a long, dark, hidden driveway.

Dean and Sam looked at one another, slightly shocked at Brielle. Finally, Dean regained his composure and turned into the drive, with Brielle covered their tracks as they pulled in.

"What's next? You gonna have your own personal Batcave?" Dean asked.

"No, but I do have a Batmobile." Brielle smirked.

Sam chuckled under his breath, as Dean navigated the car down the long drive.

About a half mile later, Dean pulled Brielle's Camaro into the garage of a small, two-story home that was hidden under the cover of the heavy foliage.

"Stay here." Castiel ordered, as he disappeared.

Before anyone could react to Castiel's statement, he reappeared outside of the car, and opened Brielle's door, slightly startling the passengers of the vehicle.

"It's safe. We can go inside now." He stated, helping Brielle out of the car, staying close to her, his protectiveness of the girl evident in his demeanor.

As they stepped inside, Brielle flipped the lights on, and, much to the boys surprise, they saw nothing more than an average looking home.

Dean looked around, examining his surroundings. "Cass, with all that talk about keeping her safe, I was expecting like Alcatraz or something."

"Does she at least have a panic room?" Sam asked.

Brielle laughed and looked at the boys. "Panic room? Guys this entire house is a panic room. Every wall, both interior and exterior, has two layers of iron and a layer of salt inside of the wood."

She walked over to a window. "Every window is reinforced with iron and salt around them also. There are devils traps under the carpet and on the other side of the ceiling panels at every window and door."

She then directed their attention upward. "Oh, and those sprinklers on the ceiling. Yeah, definitely spray holy water when they're activated."

Dean looked over at Sam. "Sammy, remind me to tell Bobby he's now number two on the awesome people list."

Sam rolled his eyes at his brother as Brielle smiled at the comment.

"How did you pay for all this?" The younger Winchester asked.

"Are you kidding? I didn't pay for a cent of this. The angels took care of it."

"Cass, I thought we were important. How come you never set us up in a place like this?" Dean asked.

"Simple. We like her better." Castiel stated, in his monotone voice that made everyone question if he was joking or not.

Castiel then looked at Brielle. "Brielle, I must go. There are things I must take care of."

"No way Cass. You're hurt. You need to stay here and rest."

"Brielle, you need to stop worrying about me so much. I'm the guardian angel here, not you. I'll be back soon."

"Promise?"

"Yes Brielle." He said, as she hugged him.

He then whispered "You can tell them," in her ear, Sam and Dean unable to hear him.

He then glanced at the Winchester boys. "Keep her safe."

With that, he disappeared.

"Does he do that a lot?" Sam asked.

"What? The whole disappearing thing? Yeah, all the flippin' time." Brielle said, smiling. "I'll go ahead and start dinner for you boys, if you're hungry."

Dean glanced at Sam, who nodded. He then grinned at Brielle, "Well, I'm starving actually, but me and Sammy were wondering if maybe we could talk to you for a few minutes. We've got some questions about you that'd we'd really like to get some answers to."

"But, only if you're comfortable with answering the questions." Sam quickly added.

She nodded, "I knew this was coming. Why don't we go into the living room, and we can talk in there."

She walked into the living room, the boys following her into the room. Dean and Sam took a seat on the couch, while Brielle sat in a chair in front of them.

They sat there in silence for a few moments, until Brielle finally spoke up.

"So, what do you guys want to know?"

"Well, first we want to thank you for saving us. You got a pretty good beating on account of us, so we want to say 'thank you.'" Sam said.

"You don't have to thank me. Helping you guys was no big deal."

"But, why did you save us?" Dean inquired.

"And not just save us, but you were like, dead set on protecting us. You seemed like you could've killed Zechariah for what he did. I mean, I can understand you being upset about what they did to Cass, but there was more to it then that. It was like you were just as upset about them hurting us as you were about them hurting Castiel." Sam questioned.

Brielle's began to mouth something, but she couldn't formulate any words. She looked to the ceiling, struggling with how to say what needed to be said.

She sighed as she stood up and ran her hand through her hair. She started to pace across the room.

"I can't believe this. Castiel finally tells me I can let you guys in on the big secret, and now, I don't know how to tell you guys."

Sam tried to easy the girl's nerves. "Brielle, you can tell us. Whatever it is, I'm sure it's not that big of a deal."

She looked over at the boys. "Well, I guess I'll just come out and say it."

"My father is John Winchester. I'm your sister."

The boys' jaws practically hit the floor at the words that came out of Brielle's mouth.

"Come again?" Dean asked.

"You're my brothers. We have the same father."

"Are you sure?" Sam asked.

"Yeah. Angels are just as accurate as any paternity test. Mom and Da…John were on a hunt together in Kentucky. You guys may remember it. It was in February of 1990? It would have lasted about a month or so."

"Yeah, I do remember that. We stayed with Pastor Jim. Dad said he was meeting up with some other hunters and that it'd only take a week or so. Ended up lasting nearly a month and a half. Guess we know why now." Dean said, anger towards his father evident in his voice.

"So, you're our sister?" Sam was still trying to wrap his mind around the concept.

Brielle nodded.

Sam ran his hands through his hair as Dean sighed. "I need a beer."

"Sorry, I'm only 18. I don't have any."

"Perfect." Dean muttered.

"So, Cass knew about you this entire time and never told us?" Sam asked.

"I could not tell you." Castiel's voice said from the doorway to the living room.

"Yeah. And why not?" Dean hissed, his emotions on edge.

"One, Zechariah told me I couldn't, and at that time, I thought he was still following the will of God. And we were also trying to keep her safe. As I already told you, she might fight like an angel, but she takes hits like a human. She isn't invincible or self-healing. We couldn't risk her safety. I wouldn't allow it."

The brothers caught the concern in his voice, but, quite frankly, they were still extremely upset that he never told them.

"Cass, you should have told us." Dean said.

Sam nodded in agreement, "Yeah. Castiel. We had a right to know."

"I'm sorry, but I was only looking out for her safety. There are more demons after her than there have ever been after you. She's a part of the prophecy, just as you two are."

"What prophecy?"

"The one that talks of the end times. It reads:

"The greatest hunter of all time

Will sacrifice himself for his son's life

His eldest will be the one to start it all

Break the first seal and begin Earth's fall

His second eldest will finish the deed

The angels' warnings he shall not heed.

But, his youngest child will pick a side

To ensure their victory…."

Castiel stopped mid-sentence, unable to complete the prophecy.

"Cass?" Brielle looked at him concerned. "Why are you acting so weird? The end of the prophecy isn't that bad."

"What does it say?" Sam asked.

"It just says that 'To ensure their victory, the child shall rise." She shrugged her shoulders.

"Brielle," Castiel placed his hand on her shoulders and had her face him. "That isn't what the prophecy says."

She raised an eyebrow. "What do you mean, 'That isn't what the prophecy says?' That's what you've always told me it says. Does it say something else?"

Castiel looked towards the ground.

"Castiel. What does it say?"

He looked up at her, and she could have sworn his eyes were brimming with tears.

"It says that 'His youngest child will pick a side. To ensure their victory, the child will die."