Disclaimer: I (unfortunately) do not own the world of Percy Jackson. Only Luna is my character.

Right, this is my first PJO fanfic, and it's in my AU xD Like, what if Percy had someone other than Annabeth to help defeat Kronos? Well, this is my version of the Last Olympian :)

Chapter 1

Camp Half-Blood

My name is Luna. Yes, it's a strange name, but practically everything about me is strange. I am fourteen, almost fifteen and I have wavy auburn hair that reaches my middle that I sometimes keep braided, and silvery grey eyes. I love archery and animals, and I especially have a soft spot for anything to do with the sky, like stargazing, astronomy, the moon and basically any thing else along those lines. I suppose you could say I'm a dreamer. The only thing I don't really like are boys. I tend to stay away from them like they're the plague. My dad is an astronomer, but I don't know my mum. Dad says I got most of my features, personality and talents from her, including a bow, arrows and a quiver. I say: yeah right. Apart from that, they are one of my most prized possessions. The bow is made of a dainty but strong wood, engraved with galloping antelopes and wolves, with a full moon shining down on them. The arrows are the same, except they are engraved with flying falcons and decorated with stars. At times, I swear the animals on the wood actually moves. But that's impossible, right? Apparently not.

You could say that I'm your reasonably average teenager girl, but that's about it. I am one of those ADHD kids. I can't sit still for longer than a minute. And to make my education worse, I am also dyslexic. Honestly, it's probably the worst combination ever, especially for teachers. I'm their worst nightmare. And that's not even the half of it. There was a time when a Sphinx attacked me. A Sphinx! From those Greek myths! I know about those. The last few schools I've been to had been studying them. But they couldn't be real. It was impossible, right? Wrong. Other times, there were other creatures that came after me. And today had been like any other day.

I finished school and decided to take a walk along the Montauk beach and get a bus or taxi home, but one of the weirdest things in my life happened as I was looking out to sea, and that's saying something. I've seen a lot of weird things in my life so far, but this practically tops it all. A boy, probably about a year older than me, shot out of the sea and tumbled onto the sand. Literally. I mean, how could someone just shoot out of the sea? Well, that was the day my life changed completely. I ran to help him, or at least, to make sure he was okay. He had black hair and green eyes that told me he had seen many terrible things. He had a black ballpoint pen in his pocket, but get this: he was dry. He wasn't wet from the sea. How was that possible? The sky rumbled above us, and in answer, the sea rumbled back. The sky had gone a darker grey, whereas the sea had taken a darker blue-ish green colour. We both stared out to sea. It might've been my imagination, but there seemed to be flashes, bright white ones and sometimes green ones, appearing beneath the sea.

'War is brewing.' a voice muttered.

Startled, I look at the boy. Did he just say that a war was brewing? It couldn't be though because it would be all over the news. I noticed the boy had a cord around his neck, decorated with four beads and a-wait a minute. Was that a sand dollar? I stare at him incredulously. I wanted to ask who he was, but all that came out was 'Uh, you have a sand dollar.'. Smart, huh? NOT. But I also got his attention. He finally looked at me, and his face displayed three different emotions. The first one was a startled emotion, then came recognition, and then confusion. He stood up abruptly and brushed off his clothes. He muttered to himself, something along the lines like 'Not who I thought she was' and 'Beckendorf' and then 'Poor Silena'.

'Excuse me, but who are you?' I ask.

He blinks at me.

'Percy Jackson.' he finally answers.

'Percy Jackson...' I repeat thoughtfully. Why does that name sound familiar? 'How come you just came out of the sea and you're not even wet?'

'You... You saw that?' he stammers.

'Well, it was hard to miss.'

There was silence. I looked around. That was when I realised that although the beach was quite busy, nobody, not even the person closest to us, had seen him. Then I tensed. Beside me, Percy had reached for his pen, like it was an instinct. I guess we both had that feeling that something bad was approaching.

"Look who we have here. Two demigods. Who should I eat first? The Son of the Sea God, or the Daughter of the Moon? I think I shall eat the Son of the Sea God, nobody runs away from me in the Labyrinth and gets away with it."

I spun around at the same time as Percy. He had his pen in his hand now, held out readily. My breath caught in my throat and despair and fear clutched at my heart. It was another Sphinx. Not now, I think desperately. The last time I faced one, I had barely escaped with my life.

Percy uncapped his pen and it grew into a sword about a meter long. I yelp and jump back. The people on the beach started screaming and running around. Percy glanced at me weirdly. The Sphinx tensed her muscles in her legs, and I knew what that meant: trouble.

The Sphinx pounced, but Percy was fast. He rolled to the side, out of the way. I wish that I had I had my bow and arrows (and quiver). As soon as I wish it, they appeared; the bow in my hands and my quiver on my back, holding all my arrows. I stared at them. Where had these come from?

The Sphinx swipes her paw. I wasn't paying attention, so naturally, I got thrown to the side. I landed in the sand a few yards away, my breath knocked out of me. Percy was dodging and slicing at her, trying to keep her at bay. I stand up and nock an arrow. As I aim, a feeling of nostalgia wash over me. I've shot an arrow before at targets and have always hit the bulls eye. Dad had always said that I was a natural. I let loose the arrow when the Sphinx opened her mouth, probably to roar. At the same time my arrow buried itself into her throat, Percy stabbed her in the chest. An instant later, she disintegrated, leaving my arrow toppling to the sand. I walk over, pick it up and put it back in my quiver. I then turn to Percy Jackson.

"Why do monsters come after me?" I ask. I feel that he knows the answer.

He looks at me sharply and I shrug.

"It might be because you're with me." he answers, somewhat doubtfully.

I shake my head though.

"No way. Monsters have attacked me before today." as I talk, I slung my bow onto my back.

"Those bow and arrows..." Percy says slowly. "They just appeared, didn't they?"

I nod. Well, they had.

"Where are they now?" he asks.

"What? On my back, of course."

I had just put them there. Is he blind or stupid? Or maybe both...?

"They're not there anymore," he states.

I feel behind my back. Ok, I take that back about him! He's right! They're gone! Disappeared, vanished, what ever you want to call it.

"I saw them. It just looked like they... melted away." Percy says.

I stare at him. Seriously, who is this guy? Then it hits me. How could I be so stupid to forget?

"You're that Percy Jackson guy that had gone missing a few years back!"

Aha, I got it! His jaw had dropped open. Score! Uh, why am I keeping scores again?

"You... I... Uh..." he splutters.

"No, seriously. That story about being kidnapped? Dude, that guy on the beach with you had a sword, not a gun. And so did you. So explain."

I cross my arms over my chest and give him 'My Look'. In answer, he throws his hands in the air, from frustration, I think.

"Look, I can't explain everything now. You saw what just happened here. Knowing my luck, the police will be here soon."

"Oh, really?"

As convincing as that may sound, I'm not about to just go off somewhere with some random guy that came out of the sea like it was the most natural thing in the world, which it wasn't. But far off, I can already hear the police sirens, and suddenly, I think that's a brilliant idea.

"Ok, I'm convinced. Lets go!"

He grabs my hand and leads me to a taxi. I almost recoil, but I manage to keep going. Percy practically shoves me into the cab and then gets in after me.

"To Long Island please." he says. "And fast might be a nice idea." he adds.

The driver drives us as fast as he can along the road to a place that I've heard of, but never really been. But Percy asks him to stop just below this hill that had a pine tree on the top.

"You sure kid? There's nothing up there to see." the driver says.

"I'm sure." Percy says firmly.

We get out, and since Percy doesn't really have any money, apart from that sand dollar, I pay for the ride. He looks at me gratefully, but I raise a brow at him.

"You owe me." I say.

He nods then leads me up the hill. Then I gasp. I couldn't help it. On the lowest branch of the tree, a golden fleece is hanging, and a dragon is coiled round it.

"Seriously? What is this place?"

"This is called Half-Blood Hill. But the place below, this is where people like us go to train. We call it Camp Half-Blood."

"Camp Half-Blood?"

"Um, yes, see people like us is called demigods, or half-bloods."

"Half what?"

"Half-bloods. See, we're half human, and half god."

I stare down below. It really looks like a peaceful place. There's a big white house, a strawberry field, a forest, a training ground (?) and a whole load of other stuff. And, I recognise other things as well, things that I have never seen in person before, but in pictures; satyrs, nymphs, pegasi, even a centaur. And there was even a camp fire, and twelve cabins, all placed in a U-shape.

"Do you see the big white house, the strawberry fields, everything?"

I nod, dumbstruck.

"Then we can cross the borders."

He confidently walks round the dragon, scratching its head on the way past, and I hesitantly edge round it, not wanting to go anywhere near it than I have to. We go down the hill and meet the centaur.

"Chiron! Guess who I found?"

The centaur turns around and his eyes practically lights up.

"Percy! You're back. How did the, ah... mission go?"

Percy sobered up. The centaur-ahem, Chiron-seemed to instantly understand and nodded.

"Lets talk about it inside."

Chiron was about to turn and go when Percy stopped him.

"Wait. I have a new demigod for you to meet."

Chiron looked at him in surprise, then his eyes rested on me.

"Well, hello there."

I shyly say 'hello' back. Well, technically, he's a guy too.

"Chiron, meet... um..." Percy turns to me. "Sorry, I never quite got your name."

"Oh, that's quite alright. I'm Luna. Luna Ray."

"Nice to meet you Luna Ray." Chiron says.

"Are you um... really the Chiron that taught, well, you know..."

"All the famous Greek heroes?"

"Well, yes..."

"I am."

I stare at him in wonder. Wasn't he supposed to have died? But his attention has gone back to Percy, who is looking at me weirdly.

"Do you know who her Greek parent is?"

Percy shakes his head.

"Ok. Go take Luna to the Hermes cabin. They can explain it to her. We need to hold a council."

With a smile at me and a nod at Percy, Chiron walks off, towards the white house.

"Lets go then." Percy says.

I follow him again to a brown cabin. When I look in, it looked really jammed in there.

"Um... Am I in this cabin?" I ask.

Percy nods and walks in, me trailing after him.

"Guys! I want you's to meet your new cabin mate for the time being! This is Luna Ray." Percy introduces me.

The kids in here seem to all look the same. I mean, seriously. They have the same face features, and even the same mischievous smile.

"You might want to watch out for these kids." Percy warns me quietly. "They might ah, pull pranks on you, or um, 'borrow' your stuff."

I take another look at the kids and their smiles, and I believe him, even though this seems so bizarre.

"Is she determined or undetermined?" someone asks.

"Undetermined." Percy answers.

They all groan. I must've had a 'huh?' look on my face because Percy laughs.

"Can someone fill her in on stuff? Connor, Travis, Chiron needs you, he's holding a council meeting." Percy calls out.

Two boys, who look like twins, but I'm not sure if they are because all the kids in here looks the same to me, stands up and walks up to us.

"No problem." one says.

"Nice to meet you Luna." the other says.

I blink at them.

"Luna, this is Connor and Travis. Oh, in case you haven't noticed, they're twins." Percy says.

They both grin.

"Um, it's nice to meet you's too." I say quietly.

"We're the counsellors for the Hermes cabin."

"Hermes? The messenger god?" I ask.

All three nods.

"And the god of medicine, travellers, that kind." Connor adds.

"You's talk about the gods and goddesses like they're real."

"Oh, they are." Travis says casually.

"What?"

"Um, we need to go guys." Percy reminds them.

"Oh, right." they both say.

"Well, Luna. I'll have to leave you here." Percy says.

I nod, but I feel so out of my depth. Percy and the twins set off towards the house, and I turn back to the Hermes cabin.

"Over here Luna." someone calls.

I walk over to a group of my cabin mates for the time being. There were two girls and three boys. I sit beside a sandy-blonde haired girl, who smiles at me.

"Hey. I'm Anna." she says.

"I'm Rose." the other girl says.

"And I'm John." the guy on my right says.

"I'm Jack, and this is my twin, Daniel."

I say 'hi' to all of them. They seem really friendly.

"We're gonna explain about all this to you." Rose says.

"Please do." I reply.

And they launch into the explanation.

This is my first story, and yes, it is a Percy Jackson and the Olympians one, because I absolutely love that series. So, what did you's think of this chapter? I don't have a beta, so sorry if I disappointed. But yeah, drop a review, and I welcome constructive criticism.