This is just a test chapter. I will post more if I get some views.

Though it won't be a frequent update until my other story More Then One World (a Kane Chronicles and PJO crossover containing Magnus Chase and slight grown-up HP) is finished.

And this fanfiction contains all ships from PJO and HP. No made-up ships like.. er... Percy x Jason or something. None of that. Only Piper x Jason, Annabeth x Percy etc.

So here goes nothin'!

The Dimension Traveller

Chapter 1:

A rather long introduction

-Percy Jackson-

Hi, I'm Percy Jackson. Perseus Jackson to be exact, but I prefer Percy.

You probably know me so I'll skip introductions, and tell you the story.

I was having a stroll around the city before I went to camp.

I visited Starbucks, Crispy Cremes and all those places I won't be able to go when I go to camp.

Aand Blackjack was begging for more donuts too, so Crispy Creme and Dunkin' Donuts was a must-go, or Blackjack would be disappointed.

Anyway, my I had a big bag of donuts when I saw someone kick a girl about my age.

My hero-ish sense kicked in and I went to help the girl.

"Hey!" I said, "Why're you kicking her?"

"Because she's a freak, that's why!" The guy kicking her said, and the girl - she had orangish-blonde shoulder-length slightly-curvy hair, and olive-green eyes.

"Why would you think she's a freak?" I said, "And even if there is a reason, you shouldn't be kicking her around!"

"Wanna know what she did?" the man said, "She strolled into my florist, and all the plants started to either overgrow!"

Wait… she controlled the plants… Child of Demeter or Dionysus? I need to talk to her. If if she is a demigod, this guy was clear-sighted.

The mist would've made him think that it wasn't the girl's doings if this guy was a normal mortal.

"You can't blame her for that, it could be your imagination, plants doesn't so suddenly do that," I said.

"Oh, no, I know what I saw, boy," the man said, "And if you don't wanna be kicked yourself, go f*** yourself."

"Right then," I said, and stood on the spot, "I am not going to swear-word myself."

Then the man swung a punch at me, but my ADHD helped me dodge. After I dodged, I judo flipped him (Annabeth taught me).

The man groaned, and stood up, "You will regret this, kid!" he shouted, and ran off.

"Coward," I muttered, and helped the girl stand up, "Is it true? What the man said?"

"Why would I tell you?" The girl said, "Though I really thank you for helping me. But I could've handled it."

"So it is true," I said, and the girl said nothing.

"Don't be afraid to tell me, I'm like you," I added, and got the bottle of water I bought out, uncapped it, and made the water slither out of it. The girl's eyes went wide.

"Percy Jackson," I introduced myself.

"Melina Quills," the girl, Melina, said, and the grass next to me grew up the wall, "And yes, I can control plants."

"Why did you make the man's plants… you know," I asked.

"I saw him abuse his son," Melina shortly replied.

"Okay, so, uh. Look, I don't know how you survived this long out here, but you're in danger," I said, "Did you ever see a three-headed dog or creepy-looking demon lady?"

"I think so, but they were never a problem for me," Melina said, "I can always outrun them."

At the time, I didn't know that she could actually outrun any monster.

"Where's your parents?" I asked.

"I never met my mom, and my dad left me when I was nine. I refused to go to the orphanage, and ran away," Melina said, "Why am I telling you this?"

"I said, I am like you, I know where your mother probably is, and I know where all your half-siblings are at," I said.

"Half-siblings?" Melina said.

"This is hard to explain, I'll take you there, then it's be much easier to explain," I said.

"I was taught to never follow strangers by my idiotic dad," Melina said, "But I will go with you, since I would always be able to get away from wherever you are taking me to."

And I got her to camp, while giving her the basics, like how she was a demigod and all.

And on the camp's famous hill, she gasped like all the others.

"Welcome, to Camp Half-Blood, where Greek mythology is real," I said, "Come on, I'll take you to Chiron."

"Chiron? As in the Chiron?" Melina said.

"Yup," I said, and went down the hill.

"Hey Kelp!" I heard from the distance, and saw Leo run towards me, with something in his hands.

"Ah Leo, wait what is that- AH!" the last bit was me being attacked by Leo by his new invention.

It spews out slime. And I got covered in it.

"You know this will not soak me," I said.

"But it will still be on your skin," Leo said, and noticed Melina, "Hey, new camper?"

"Yes," I said, "I found her just now."

"Hi! I'm the super-hot flamin' boy Leo Valdez! But I'm already taken," Leo said, and went off into the distance to fire his slime-gun at someone else. Probably the Aphrodite Cabin, who would freak out if that touched their hair.

We soon arrived at the Big House, and Chiron was in.

"Chiron?" I called.

"Yes, Percy? You arrived early," Chiron said (he was in centaur form), and looked at Melina, "I see, new camper. What is your name?"

"Melina Quills, sir," Melina said.

"Something tells me that that's not your real name," Chiron said, and Melina sighed.

"Real name is Melina Oakwood, sir," Melina said, "But that's my dad's name. So after I ran away, I just didn't tell people my real name because I didn't like it. 'Quills' just popped out of nowhere."

"So your godly parent is female," Chiron said, "Though you'll have to be in the Hermes Cabin until you are claimed. I suppose Percy told you the basics?"

"Yes, sir," Melina said.

"And you may call me Chiron or Mr Burner," Chiron said, "Percy, show her to the Hermes Cabin."

"Okay! But after a visit to the my cabin because I need to drop off all these donuts," I said, shaking the big bag of donuts, and left with Melina.

"Who's your godly parent?" Melina asked me.

"Poseidon," I said.

"That makes sense," Melina said, probably recalling me control water, "And you must be very powerful."

"I am, that's why many gods wants to kill me," I said, "Aand there was this oath that the Big Three can't have children, but my dad did have me, so Hades and Zeus is always at me."

"Harsh life," Melina said, and someone came running to us.

"Seaweed!" Annabeth said, and looked at Melina, "New camper? Hi, I'm Annabeth, Daughter of Athena."

"Melina Quills… ah, Oakwood. But I would like Quills, and dunno who my mom is though," Melina said, "And if you are a daughter of Athena… you must be smart."

"Yes, I am," Annabeth said.

"685.8842 times 43200?" Melina suddenly asked, and Annabeth thought for about 26seconds, and answered:

"29630197.44."

"Correct!" Melina exclaimed, "Finally I meet someone smart! That's impressive for a non-speedster, you're not a speedster, right?"

"A what?" Annabeth asked.

"Speedster," Melina said, "You know, someone who is able to run faster than the speed of sound? Is there nobody else like me here?"

"I don't get what you mean," I said.

Melina sighed, and in one second, she was gone, leaving a trail of green lightening behind, and then the next second, we were holding cupcakes.

"How- what-?" Annabeth and I exclaimed simultaneously.

"So nobody can do that," Melina said, "I thought you said there are more like me."

"There are more that can grow plants by their will," I said, "Not run fast."

"Hold up, so if there is more like me, why isn't World Hunger ending?" Melina said, "I mean, I once grew lots of grape trees on the back of someone's yard, so that the homeless can get food."

"First, we aren't allowed to interfere in those sort of stuff- and Chiron barely lets us leave," Annabeth said, "Second, I need to ask you- how fast did you do that?"

"I grew the stuff in about… five seconds, those takes longer than running, because it's not me," Melina said.

"Melina, no demigod with Chlorokinesis has grown a full-grown plant that fast before," Annabeth said.

"Oh and did you steal these cupcakes?" I asked.

"Uh… sort of?" Melina said, "I live on the streets, what do you expect me to do? I have no money at all. But I did clean the whole shop and moved some heavy stuff the employee was moving."

"Melina, you aren't supposed to steal," I said, "BUT I do like the cupcake. It's blue!" I earned a harsh poke from Annabeth for that one.

"Melina, so, er, we need to talk to Chiron about this," Annabeth said, "You're.. different."

"True," Melina said, "Hey Percy, where's your cabin?"

"It's the one with the rough gray stone with pieces as the outer wall, and has seashell and coral stuck onto the side, why?" I said. Melina smiled and the next second, my bag of donuts if gone along with Melina, and the next second, Melina is back.

"Okay, the donuts are on one of the beds inside," Melina said, "Let's goto Chiron again," she put her hand on the back of Annabeth and I's neck.

"What are you doing?" I asked.

"I'm making sure you don't get Whiplashed," Melina said, and I felt like I was shadow-traveling, only brighter.

After a second of wind rushing onto my face, I was in front of the Big House.

"Whoo… wow," I muttered, "I don't want to do that, ever again."

"Me too," Annaebeth said, and Chiron came.

"What are you three doing here? Percy, I thought I told you to take Melina to the Hermes Cabin," Chiron said.

"Uh… about Melina…" I said.

"They say I'm different," Melina said, "Like this," she held her hand up, and is was vibrating at super-speed. Then she put her hand through the wall.

"Your- your hands are vibrating at air's frequency…" Annabeth said, "And it means…"

"I can phase through anything, yes," Melina said.

Chiron looked shocked.

"Chiron?" I said, as Chiron remained silent for a few seconds, and Mr D walked out of the Big House.

"What's a matter here?" he lazily said, Melina just showing him her vibrating hand. Dionysus was shocked too.

"I've never seen anything like this my whole godly life!" He exclaimed.

"Nor did I," Chiron said.

"Really?" Annabeth said.

"What else can you do, Melina?" Chiron asked, and Melina grew a whole Palm Tree right next to us in seconds, then made it wither and turn into dust.

"You're not my kid," Dionysus said, "You must be Demeter's child."

"The most powerful Demeter Child I've ever seen," Chiron said, "With your speed… I daresay you're as powerful as the Big Three's children- or the gods themselves."

"Wait, really?" Melina said.

"Melina, you can murder everyone in the country in seconds if you wanted to," Chiron said.

"But I don't," Melina said.

"You are still powerful," Chiron said.

"Yeah… I am," Melina said, "So… are you going to kill me?"

"No, the opposite," Chiron said, "I will be grateful to train you. Now, go to your cabin."

"Okay," I said, and Percy and Annabeth led me to the Hermes Cabin.

"Connor! Travis! New camper!" I shouted, and the Stolls came out.

"Hi-!" Travis said.

"Welcome-!" Connor said.

"To-!" Travis continued.

"The-!" Conner continued.

"HERMES CABIN!" they both concluded, "We're the Stoll Brothers!"

"Thank you for the warm welcome," Melina said.

"Come on, let's find you a spare bed," Connor said, and Melina went inside the cabin.

—

Melina

Travis and Connor found me a unoccupied bed.

"This guy turned out to be a Son of Ares, so he moved to his rightful cabin," Connor said.

"But he was such a pretty boy- we thought he was a Aphrodite," Travis commented.

I nodded.

When they left, I decided to explore the camp. I put my bag down on the bed, and ran off.

I saw a lava climbing wall, some people practicing archery (I may have made all the arrows hit the middle) and much more.

What really caught my attention was people practicing sword-fighting.

It seemed fun.

And I spotted Percy.

—

Percy

I was dueling with Jason (who was at CHB), when Melina appeared right next to me.

"AH!" Jason shouted.

"Oh hi Melina!" I said, and I noticed others staring at Melina.

"Guys, she's a new camper," I said.

"How… what was that?" Jim, a Son of Dionysus (random name) said.

"Superspeed," Melina told Jim, "I'm fast. And hey, is that a sword?"

"Yes," I said, "If you want, I can ask Leo to craft you a perfect sword for you. First, let's find you a base sword for him to work on."

I led her to where the swords were.

Melina then started to find a perfect sword for her. She found it relatively quickly. She went through then at normal speed, as swinging a sword at super-speed makes it… well, impossible. You can't really feel how the sword is like when you're moving so fast, can you?

Wait, is that right?

Anyway, she soon found a sword that was a perfect match for her.

"Okay so Jason, do you wanna come with?" I asked.

"Sure," Jason said, and we headed to the Hephaestus Cabin, even though Leo was probably not there, but somewhere around camp, shooting people with the slime-gun.

Then I saw it- a part of the grass covered in green goo, plus a laughing Leo and a bunch of Aphrodite kids covered in slime.

"LEO!" I shouted, and he came over to us, leaving the shocked and angry Aphrodite kids behind. We also saw Piper approach her siblings, trying not to laugh. As councillor, she was listening to them.

"Aquaman, what's up?" Leo said, with a big smile on his face.

"If you don't mind, can you make a sword for Melina?" I asked.

"Sure, I love forging!" Leo said, and Melina handed him the base sword.

"VALDEZ!" came Piper's voice, and soon, Piper came towards us, "Did you really have to do that?"

"That's the reason I invented this! Just look at their face!" Leo said, "Oh and I'm about to give this to the Stolls. They promised me something."

"Hell no!" Jason said, "This, in the hand of the Stolls? Camp will be in chaos! And Goo!"

"It's doesn't matter, I can clean it up," Melina said.

"Whaddya mean?" Leo said.

"I can run fast," I said, "If you didn't see me do that already."

"So you were the green lightening?" Leo said, "You know, I got Flash vibes from that."

"Yeah, I basically have the powers of the Flash plus controlling plants," Melina said.

"I am going to enjoy crafting your sword," Leo said, and he had to run off in a hurry due to a bunch of Aphrodite kids running to him in anger. Piper then let a bit of her laugh through.

"Piper! Don't just stand there!" Kelly (random name!) shouted, "Make him stop running!"

"Sorry, but Leo is out of my range," Piper said, and watched Leo run away, shouting:

"That was Mr Flaming Hot Valdez everyone!" Leo said, "And that was on live on Hephaestus TV!" he took off a little camera-pin from his clothes, and waved it around, "That was the awesome Slime-Gun-Prank!"

"Well, that was… chaotic," Melina commented.

"Oh hi, and I'm Piper McLean, Daughter of Aphrodite," Piper told Melina.

"I'm Melina Quills," Melina said, "Hey, when's dinner?"

"In a few minutes," Jason said, "How about we go stop Leo giving the slime-gun to the Stolls."

"Great idea," I said, and Melina put her hand on the back of Piper and Jason's neck.

"Hey what is thiIIIISSSS!" poor Jason and Piper got carried off by Melina, off into the distance.

"Whew, it wasn't me this time," I said, and chased after the lightening trail.

—

First, we stopped Leo from giving the slime gun to the Stolls, and then we went to Dinner.

I, of course, was alone on my table.

I saw Melina sacrifice her food, and munching on it at super-speed. The food disappeared quickly (quickly as in, one second).

Then it happened- when everyone was done sacrificing food, Melina was claimed. The symbol of Demeter showed up over her head.

"Demigods, let's welcome Melina… Quills, Daughter of Demeter!" Chiron said, respecting how Melina didn't like her real name, and Melina moved to the Demeter Table (at normal speed).

The next day, the gods called in the Children of the Big Three and Melina to Olyimpus.

They too, thought Melina was dangerous, and they did their 'normal' conversation about what to do with her- basically deciding wether to kill Melina or not.

Demeter was trying to get the other Olympians to not kill Melina.

"She is still one of our demigods!" she protested.

"She can kill all the other demigods in seconds!" Zeus said, "The whole nation! The whole world!"

"Why was she born like this in the first place?" Hephaestus said, "How did she even get the speed?"

"I think it is unwise to kill such talented demigod, father," Athena said, "She would be an great ally during war."

"And a great threat at the same time," Zeus said.

"Demeter, what do you know about the girl's father? Her speed may come from him," Artemis said.

"I do not know, he didn't have speed like Melina," Demeter said, "Besides, how would a mortal have such power?"

"I agree with Demeter," Aphrodite said, "A mortal will never have such power."

"Now, now, now," Hades said, "You all invited me over, just to show a killing scene? To send another over? Did you?"

"Hades, we called you in, because we needed all opinions of the Big Three," Poseidon (my awesome dad) said, "Now, how about we let the demigods talk?"

"Good idea," Ares said, "Let them speak out their puny voices."

The gods went silent, to let us talk.

"So- uh… Melina's been such a great camper," I said, "She cooks most of the meals, and I have to say, they're really good."

"She is extremely intelligent, like a Child of Athena," Thalia said. Athena seemed impressed.

"She sees the world with her own view," Nico said.

"What kind of view?" Hermes asked.

"The homeless, poverty point of view," Melina said, "The hungry point of view."

"You used your speed to steal food," Demeter said, "Now, my child, you mustn't use your powers like that."

"What do you expect from me?" Melina said, "Dad left, and nobody was there to tell me that stealing was bad. You all didn't even notice me until I showed up in camp! You weren't there when I discovered my speed when I was 12. I was so shocked, I freaked out. I couldn't move properly. Different body parts moved in different speeds, and once, I nearly killed a child because I couldn't handle my speed!" her voice was getting louder, "I even tried to kill myself after that. I dug up a knife from the dumpster and stabbed my stomach with it. But no, I heal fast as well. I healed so fast that I couldn't kill myself," I gestured to her to stop, but she didn't listen, "I even tried hanging myself, but I would vibrate out of the rope. Then I decided to just live with it- no matter how rotten I may have to turn into. That's why I began to steal. That's when I actually got clothes and access to showers. And when you all finally notice me, you talk about killing me. Do you even-"

"ENOUGH!" Zeus boomed, and Melina shut up, "Fellow Olympians, what do you think?"

"I say we let her live, and prove herself to be an ally," Hephaestus said.

"I agree," Athena said, "We must give her a chance."

Zeus grunted, "Melina Oakwood, we will not kill you for now, but beware, if we sight you in any suspicious movement, we will have to kill you. And you are banned from using your speed," Zeus announced.

"Remember: You're powerful as the three standing next to you," Poseidon added.

"Thank you…" Melina said, clearly upset that she is now banned from using her speed.

"We totally get how you feel right now," Thalia said once we boarded the elevator, "I mean come on, being powerful ain't the reason that they should kill us."

"True," Nico said, probably remembering what Zeus did, to his mother.

"Though I really do wonder… where does my speed come from?" Melina inquired, and none of us could guess.

—

Today, during Lunch, a blue portal (looking slightly similar to the ones Sadie and Carter uses) opened up.

"Holy Hera, what is that?" I heard a few shout out.

I heard more people swear when a man with Dark-Blue hair and sky-blue eyes wearing a white trench coat and blue pants came through it.

"Melina Oakwood?" he asked for.

Melina raised her hand, "Here! But I do prefer Quills."

The man stared at her, "You look like your father, Melina."

"Is that a insult? Cuz I am taking it as one," Melina said.

"You might think he left you, but no, Melina," the man said, "He died a hero, and you must come with me to fulfil your family's mission."

"Uh…" Melina said, stunned, and she looked at everyone, and at Chiron and Mr D.

"Now, now, you can't just take a demigod out of camp, even though I would like it," Mr D said, "Who exactly are you?"

"I went by a few names, Keeper of Dimensions, Opener of Portals, but my name I gave myself is Portal," 'Portal' said.

"And why do you wish to take Melina?" Chiron asked, as the portal closed.

"We shall talk inside," Portal said, "And I would like Melina, Percy Jackson, Annabeth Chase, Piper McLean and Jason Grace to come with."

We glanced at everyone who was called, and we stood up, and followed them to the Big house.

—

At first, we thought this guy was a lunatic, as he said we were characters of a book.

"You do something here, and someone in other dimensions write books about it," Portal said, "Other people in other dimensions may know you via the books. Though there are some dimensions with no specific book, tv show etc."

"So… what do you want us to do again?" I asked.

"Go to another dimension, go undercover, and fix that dimension," Portal said.

"Who is this 'Vortex' again?" Jason asked.

"Vortex has been a enemy of mine- and the whole of the Oakwood family for centuries. The Oakwoods were dimension travelers. They went between dimensions to fix what's wrong- to fix what Vortex has done," Portal said, and looked at Melina, "You father died when… when he was being chased by a a giant Sea Monster in the Pirates of the Caribbean dimension," he said, "When somebody dies in another dimension, he or she goes back to his or her dimension. But something went wrong- Vortex managed to use all of his power to stop Chris from regenerating, thinking he was the last Oakwood."

"He was unable to do anything for 9 years, until now- he has interfered with the Harry Potter dimension," Portal continued, "I wanted to keep you out of this, Melina, but I guess that is impossible. You must finish what your family started."

"Hold up, so my speed is from my dad's side," Melina said.

"Not exactly," Portal answered, "Your father could turn his body into parts of animals- he could sprout gills and wings, he could turn his hands into a one a bear has. Or he could turn into a animal completely and talk to animals. Your grandfather's ability was Fire Control. The mutation of your bloodline always changed- but I did know one Oakwood with speed maybe 430 years ago."

"Hey, if the 'Oakwoods' are so special, then was all the Oakwoods male?" Melina asked.

"No," Portal answered, "The Oakwoods allways had mixed names such as Oakwood-Winds. Some of the husbands of a female Oakwood will let the Oakwood name pass, not his name. And in case of Oakwood-Winds, the daughter or son always committed to Oakwood."

"Oh and why would you need us?" Annabeth asked.

"Because few demigods would defiantly be helpful," Portal said, "I wanted to call in Thalia and Nico DiAngelo too, but it seems like they aren't here. I won't call them in by force."

We looked at Chiron, and he said: "I permit this quest."

"Wonderful," Portal said, and we went outside, and Portal opened a portal (Portal is a rubbish name).

And us five was sent through the portal into the famous HP fandom.

Oh and one followed us in secret.

So how was it? I hope you liked it, if you did, please review so I can know if people actually likes this or not.

Oh yeah, and Melina is... a bit confused, and she doesn't know what she is. As she said- nobody was there to teach her, and to guide her when we discovered her powers.

The reason why the Oakwoods are so special, and why it must be them whom travels between dimensions, will be revealed during the story.

Thank you for reading.

-Bookworm2206