Disclaimer: I own nothing. So here's the deal, Perci is a girl version of Percy. Have fun. Slight Avengers input.

Chapter 1

If Sally Jackson had lived things would have been different, if her death wasn't so violent that it called a demon to it things would have been different, if a seven year old Perci Jackson hadn't killed the demon… well none of this would have happened at all. Especially if the Winchesters hadn't seen the whole thing and taken her with them, then this really would have been different.

My name is Persia Winchester, formerly Jackson and I am twelve years old. I'm a hunter. The job that my boy's Dean and Sam, as I have come to think of the two men that saved me and stayed with me from the time I was six, were working on took place in Yancy Academy.

Well I thought it did, in all actuality Sam just told me that so I could go to school. I hate school and when I figured out that there was no malevolent spirit he blackmailed me into finishing the semester. Never again, I suppose the Dean had only been dragged to hell by that bitch Lillith two weeks ago.

So that led us to the museum that we were in currently. Mr Brunner was talking about Ancient Greek funeral rights. Our pre-algebra teacher was standing behind us. She was a monster. Sam doesn't believe me, probably because I would say anything to get out of here.

"Ms Jackson," she said tapping my shoulder, "We need to talk." I used Jackson as opposed to Winchester because I was sort of wanted by the FBI. Yeah, when most kids are afraid of the things in there closet they get told that everything will be okay and to go back to bed. I was handed a 45 and told to shoot at anything that moves.

"What do we need to talk about?" I asked, waiting for her to attack. This is because it's what they do, eventually.

"Where is it?" she hissed, swirling to face me. I had no idea what she was talking about, the colt maybe?

"What?" I said, "Mrs Dodds I have no idea what you talking about." If it was the colt then I was telling her that I had never see it.

"Liar, confess and you shall suffer less pain," she rasped. I told her I didn't know and she turned into something else. A clawed, winged creature. She rushed at me; I dodged and ran into the next empty room, throwing a table in front of it.

Digging chalk out of my pocket I sketch a devil's trap onto the floor. Shit, she was never going to walk into it if she could see it. There was a white sheet lying next to some painting equipment. I spread it over the symbol right before the door burst open.

"Where is it thief, you stole it and the lightning bolt," she jeered, before lunging at me. Success, she hit the barrier. "What, what is this?"

"Devils trap," I said, throwing of the sheet to show the symbol. "Now," I continued, "You have ten seconds to tell me what I want to know before I kill you. What have I supposedly stolen?"

"You know," she screeched silently. I pulled Ruby's knife from under my dress, as she started ranting. Something about disrespecting her Lord and how I will die at the hands of the Gods, she called me an illegal child.

"Perci," Grover and Mr Brunner said, bursting in, just in time to see me slash the knife across the creature's throat. Red electricity looking stuff coursed through her and the body of whoever she was possessing fell on the floor the creature inside her turned to golden dust.

"Well that's never happened before," I sighed. Thankfully I could now get the hell out of school and get tutored in the important things. Like the demons and supernatural things that do a little more than go bump in the night.

"Where can we take her?" Grover said panicking, "That was a fury." Fury, I filed that away for later. My mind instantly jumped to Director Fury from SHIELD making me laugh. He headed a secret agency that had been monitoring us since the FBI practically gave up. Not that they were doing much better.

"We have no choice, take her to the camp," Mr Brunner said, "Child go with him, he will take you somewhere safe."

"What makes you think that I'm going anywhere with you, I am going home," I said, and by home I meant Dean's 67 Impala. I pulled my phone out and rang. "Hey Sammy, I told you that the pre-algebra teacher was a monster, I killed her. Can you come get me, I'm at the museum."

"Yeah, I was going to swing by anyway," he replied, "I been having visions and did some research to filled in the blanks. It isn't looking good Princess." Considering that Sam was only having visions when he was all hopped up on demon blood… yeah I'd say it's not good.

"Ok," I answered, "Meet me out front as soon as you can, love you."

"Love you too," he said, "See you in ten." The two others in the room, my teacher and my friend looked at me in shock.

"Where are you going?" Mr Brunner asked frantically, "We need to get you out of here."

"I'll say," I said with the dead body here the FBI will come looking for me again and SHIELD wouldn't be too happy. I avoid them at all costs, way more trouble than they're worth. I wasn't about to tell Grover and Mr Brunner that though, because otherwise they'd try to keep me from Sam… and Dean, we were getting him back. "My rides meeting me out front in ten."

With that I walked to the front step, Sam was already there. I hopped into the car and told him to step on it. Sam looked at me in an eerie manner, like he knew something but they didn't want me to tell them. We stopped in a motel close to Long Island.

"What is going on?" I asked sitting on one of my beds. Sam sat next to me and wrapped his arms around me. "Come on," I said, "This isn't the time to get all touchy feel-y.

"We have to send you somewhere," Sam said finally, "Because if we don't… you going to die."

"Can't we run?" I asked. I didn't want them to leave me. "Things try to kill us all the time, we have the FBI after us and you let me hunt on my own… how is this different?"

"Because we can't stop this, we can't even fight it," he said, "And if we try… we'll lose you. That isn't happening, not ever again." There was a time when a trickster convinced them I was dead… it wasn't pretty, lets just leave it at that.

"I don't care," I said fighting back tears, I never cry, "I'm not going anywhere."

"Perci, this has to do with you father," Sam said, "Your not fully human, we've known that for a long time. There are others like you, they go to a summer camp."

"My father," I spat the word with distaste, "You mean the invisible man, who knocked up my mom and hasn't been see since? Screw him; I want to stay with you. Forever."

"You gotta go," Sam said, "Because you know if you died I'd sell my soul to get you back." My breath caught in my throat, in our family this wasn't a joke it was a promise. Granddad John soul his soul for Dean and Dean had sold his for Sam.

"Sammy no, not after Dean," I said breathing shallowly, "I'll go, I promise I will but if I do you can't…"

"Shh," Sam said, "You know that's a promise that I can't make. So you're going to go and stay safe and not die. Alright?"

"Alright," I sighed dejectedly, "Tomorrow though, just give me one more night. I have… a feeling. Like if I go, I wont be able to be to come back. Not if they knew."

With that we made ourselves comfortable, drinking beer and watching the game, but neither of us let each other go. That was all right though I didn't want him to. There was a storm in the distance and it lulled me to sleep. Bang, Bang, Bang!

Here you go, Supernatural cross Percy Jackson. What do you reckon? If any of my Supernatural facts are wrong, it's because I have only gotten up to season 6. Review me.