A/N: So, this is the first of three parts of this story. I don't own Supernatural nor the characters aside from Ruth, but you already know that. Please, let me know what you think.

"Hello, Castiel."

The hunters waved their guns at the unknown voice, turning around to face the threat. A young woman with dark hair was in front of them, smiling and with a spark of excitement in her brown eyes.

"Oh, come on, boys. He knows me. I wouldn't advice on you shooting at me"

"Don't. Shoot." Castiel's eyes grew incredibly big at the sight of the girl. His voice cracked a little and a smile formed in the corners of his mouth.

"Ruth. I thought you were dead. You were supposed to be. How… How did you hide for so many years?"

"Well… You know, I learned from the best. How are you, my dear Castiel?" The woman ran on to hug Castiel, while Dean and Sam stood there, speechless.

"You gonna tell us who is this or not?" Dean's exasperated voice and arms crossed at his chest denoted little less than jealousy.

"She's… a prophet. I thought her dead for a long time. Seems I was wrong. And I'm truly happy I was."

"But he forgot to mention what would interest you the most, I suppose." Ruth smiled warmly at the hunter and placed a hand on his shoulder, just above the mark of Castiel's hand. "I'm a nephilim."

"What?!" Sam sounded shocked, but Dean didn't really know what that meant.

"I am the daughter of an angel and a human. And a prophet. And Jesus' cousin, but that doesn't really matter. God really played a good one with me, huh?"

The two hunters looked shocked at the woman, while Castiel put a hand on her cheek. She closed her eyes for just a second before watching directly at the men in front of her.

"I need your help."

The group walked into the bunker and took their seats on the library. Ruth, as Castiel had called her, sat beside the angel, relaxing when he put a hand on her shoulder.

"Thing is, I came all the way from Syria to find you. There's something big and dangerous coming your way… Our way. You might have, like, a month more. But me… Well, that's a totally different story."

"What do you mean?", Sam asked and was answered with a deep sigh from the girl.

"The Darkness… well… She's not alone. And the both of them have figured out a way to defeat God and kick him out of his own home. By that, I mean, Earth. But for that, they need something… Someone. The love child between and angel and a human. So, yeah… Me." Ruth removed uncomfortably on her chair. Castiel looked at her with sad eyes and she looked the other way. There was sadness and despair on her eyes. "When I saw it… they'd already killed three of my girls, you know?"

Castiel startled confused and, before he could ask, Ruth responded. "Three of my students. I was a teacher. It is difficult to be a woman back there, you know? Specially since they forbid for girls to go to school. We had built a hide-out where girls could go to be safe. Where they wouldn't be sold and they could get education. It was all working out until they found us. And when the vision came, three of them were already dead. So I made sure to send the rest of them across the borders to Europe, and then I disappeared and came here."

There were tears rolling down her cheeks and her nose was red. Dean pulled a handkerchief from his jeans' pocket and handed it to her. She smiled and composed herself. "I think I need some rest. Can I crash on your couch?"

The brothers smiled at her and Dean took her to his own room, as they walked down the corridor, she stopped and grabbed the hunter's arm. Looking at him straight in the eye, and with the seriousness he had never seen in anyone before, she spoke. "Take care of him, please. He needs you."

"What?" Dean asked, but before he could ever finish the word, she entered the room and locked the door behind her.

When Dean returned to the library, Sam and Castiel were speaking gravely. They both looked at Dean when he entered the room, the look on his face troubled and annoyed.

"So, what's her deal?"

"Well. She's saying the truth. And we have to keep her safe." Castiel's voice sounded rougher than ever, and Dean felt a chill down his spine.

"But, you said there were more like her. Why do they want HER?" Sam's question made Castiel fall sit to his chair again.

"Not LIKE her. Nephilim… they were born from angels and humans, but most of them were conceived… out of curiosity, if you may. Angels wanted to try how it felt to be intimate the way the humans -the most precious of God's creations- were. It was selfishness and rebellion. It was all suggested by Lucifer, of course. And, when the other angels find out about it… Well, we had orders to smite all of them. They were abominations. They were monsters. They were supernaturally strong and enjoyed on making the normal humans suffer. And so we did. Centuries happened before another nephilim appeared. It was slightly before Mary gave birth to Jesus. One of my brothers was sent to kill her, but her father… He prayed God to spare her life. Her father, Gamaliel… He was one of the purest souls I've met. He had been sent to guard one of Mary' sister. Her name was Anna. And she was as good and devoted as her younger sister. But she wasn't the chosen by God. So, Gamaliel watched over her day and night. One of those nights, the one night the archangels called upon Gamaliel for another task, she went to the well to get some water for her father, who was sick at the time. When she was getting back, she was attacked by some men from the near town. They… hurted her. Gamaliel… He had grown to love her, and when he knew what had happened, he was heartbroken. When he got to return to her, he watched her sleep, and one night he realised he was having a nightmare. She was crying, almost screaming, and none of her family seemed to notice. He materialized in her room, and hold her in his arms until she was calm. He didn't noticed when she opened her eyes. She was shocked by the sight of him, and feared he would hurt her as the other men did. But he just stared at her, smiling. And the nights she couldn't sleep, they talked. They talked for weeks and they bonded so profoundly, it became physical. Gamaliel loved Anna almost as much as he loved our Father. She… got pregnant. And they fled. They fled and we didn't had news from them for months. When Jesus was born, we were all too busy to look for them, but a few days later, there was a rumour they were hiding somewhere in Galilee and Uriel, whose vessel back there was Herod, unable to find the baby, ordered the massacre of hundreds of newborns. It was awful. But Gamaliel once was a strategist and discovered a way for them to hide. When he heard about the dead babies, he went back to help their families and was captured by Uriel. They tortured him, but he never revealed the whereabouts of his family. A couple centuries after that, Joel and I found Ruth in the Middle East. She was a healer back then and she had started having visions of the future. We weren't actually looking for her. We were finding some antiques to preserve, but she tried to flee. When we knew who she was, Joel informed Uriel, but I received a message from Michael himself to protect the girl. When Uriel and Joel returned to find her, we had hide on some caverns amid the desert. But after some days, Uriel appeared in our lair and 'kicked the crap out of me' as you say. When I woke up, I was in Heaven and Uriel was covered in blood, so… I assumed he had killed that sweet woman who was trying to help people but had the awful fortune of being the daughter of an angel. Turned out I was wrong, though. So, you see. She's not your usual nephilim. She's born from love and she's key to this plan of the Darkness. We have to protect her. Please."

Dean listened to the whole story and felt sorry for the woman in her room. He nodded at Castiel who put his face on her hands. Sam quivered at the picture of everything that Ruth had to go through and felt the need to hug someone. So he hugged himself.

"What do they want with her?" Dean asked as he gulped on the beer he just pulled out of the fridge.

"I should check into that. I need to go to Heaven. Will you be okay with that?" Castiel stood up and looked at the brothers.

"Sure, no problem. Just… You better hurry, dude."

A few hours after, Ruth appeared from the corridor and into the kitchen, messy hair and some of Dean's sweat pants. She made her own way to the coffee machine and picked some cookies from the counter. The brothers watched as she made herself at home.

"What? I knew where everything was and I didn't mean to bother you." She eated and smiled at them when she was done. "You have to get some milk around here. I like cereal better."

Sam chuckled at Dean's shocked expression. Dean was about to bitch about the entire situation when Sam intervened.

"So, do you have any idea on what the Darkness' plan is?" He inquired.

"Actually, I believe so. See, I was between jobs a few decades ago and run into these ancient scripts. They were carved onto rocks and walls of a cave, and they told the story of the two siblings. The Darkness and God, I think. And if she and whoever it is that's helping her want to screw with God, they will have to find that cave, as there was the vessel they need for the spell or whatever it is they're going to pull off. See, my visions are kind of just flashes and glances over what's about to happen, but I saw Castiel and you guys, a long time ago. I actually wanted to help you with the whole Lucifer thing, but I didn't want to, you know, get smited by those jerks. However, I really want to help you stop the Darkness, but… I have seen myself die. And I have seen you die. The three of you. And what I really wanted to do when I came here was… preventing him to die. He… He was really good to me, you know? And when God talked to me… Don't tell Castiel this, please… When God talked to me, he said you, the three of you, must save us. I've been coping with the fact I'm gonna die, but I'd gladly give my life for Castiel, I just want to know you two are worth it. And if we can find a way to save me, the better. And now I'm rambling and what I really want to say to you is that…"

"That you're scared and don't want to die. We all are. Trust me."

Ruth smiled at Sam and gripped Dean's arm by the elbow. She pulled him closer and hugged him, making the hunter uncomfortable. She whispered something on his hear that he couldn't understand in that moment, just before she left the room.

The ruffling of wings and a trench coated figure in the living room woke up Dean from his afternoon nap. The sight of Castiel draw a smile on Dean's lips, but he hid it behind a yawn.

"She, ahm, the Darkness, needs the blood of Ruth to, ahm, make a substance that would kill God." Castiel's breath was stressed and his face was grim. "Good news is… that same substance could kill her."