Disclaimer: I do not own Harry Potter or Percy Jackson. All I own is my rotten and boring imagination and plot. So yay!

A/N: Starts after DH and HoO. Trails of Apollo never happened. Pairings: Percy/Annabeth; Jason/Piper; Frank/Hazel; Leo/Calypso; Harry/Hermione.

CHAPTER 1

Harry was not amused, even the company of Hermione was doing nothing to improve his current mood. They had arrived at the Magical Congress of United States through a international portkey (he hated them!), and met the Auror Director there who explained the situation to them.

"We are not only facing the dangerous magical creatures but also some monsters which are supposed to be Greek myths. We need you two to find the cause of this while our Auror forces fight all over the country to try fighting these creatures and keeping ourselves hidden from no-majs."

Harry and Hermione had been baffled about the Greek monsters and shrugged it off as not important. Now they were seriously regretting it.

They had started from New York and searched the nearing places for any clues. They had found some monsters and creatures and had to fend them off while continuing on. They had just fought some angry Hippogriffs when they were attacked by what appeared to be over sized bird with a female face.

What did Hermione call them? Ah, Harpies

There were half a dozen of them and only two of them (not fair).They had been using only stunner and minor hexes and jinxes to fight them but to no avail. Harry saw Hermione getting overwhelmed with four of them on her. Her cheek was already cut and blood was oozing from them. Harry knew they needed to up the ante if they wanted to survive the day.

Harry interlocked eyes with Hermione and a silent agreement took place.

Slowly, Hermione came right next to him and crouched down 'Aegis'. A transparent shield surrounded both of them and Harry raised his Holly and Phoenix wand above the shield and shouted "Contundito"

The effect was immediate and all the surrounding cars bricks street signs, bricks from houses (oops!) came together and crashed into the harpies. The shield covered them both from the debris. As the dust settled down they stood up and saw the carnage around them. Hermione shot an accusing look towards Harry, who had the grace to look sheepish.

"Great work you idiot"

"Hey! They were starting to annoy me and you agreed with this"

"I thought that you would have some idea, You know that MCUSA would have our hides if they get the wind-

She froze. Apparently, the harpies did not like being buried and hated being ignored even more. Yeah! fight all your life, defeat a dark lord and what so you get? Yes, you got it right become appetizers for some hideous looking harpies that should not even exist!

Just then someone gave a battle cry and lashed on the first harpy with a sword of all things. But it did work and the harpies shrieked and dissolved into golden mist. The fight was joined by a blond girl who had her own sword with a leather grip and the two of them continued to slash, rip and stab until every monster lady dissolved into golden mist.

The two of them did not even spare them a glance before whispering to each other in hushed tones. If there was one thing that Harry hated it was being ignored. He growled and went over to them with Hermione at his side and said "How the hell did you fight them. We have been trying to fight them but to no success?"

The two noticed them and look surprised. The boy looked baffled and blurted" You could see them?"

Harry and Hermione blinked and Hermione replied" Of course we could. Its not like we are blind"

The girl looked at the destruction behind them and raised an eyebrow at them" You did that much damage by yourselves?"

Harry looked sheepish while Hermione just contented herself with giving Harry a look.

"Yeah I got a bit carried-

All of them heard the sound of splinters like that of a spider and looked up and down the alley. Large spiders with hairy eight hideous legs, large black belly and angry red eyes came down from the walls of the alley and surrounded them quickly and clicked in angry hisses.

The blond girl whimpered and the boy just looked shocked.

Hermione whispered with a little fear in her voice" Acromantulas"

The guy looked at them oddly and asked" You have fought them before?"

Hermione shook her head while Harry nodded grimly "Ran away from a colony when I was twelve."

The girl whimpered in fear and the boy took her in a one-harmed hug.

"How are we going to fight all of them?" asked the blond with fear evident in her voice.

The guy just closed his hands on his sword more tightly and took a step forward to fight them. The girl tried to stop him but he just shrugged her off and would have continued off to his death if Harry had not remarked "What are you going to do? Slash each of them till you stand upon their dead bodies like a hero in shining armour?"

The boy's eyes took an angry look and faced Harry with a stormy look" Well what do you think I should do then? Let them eat me and my girlfriend, while you stand here like a coward"

Hermione inhaled sharply while Harry closed the distance between the two boys and whispered in a cold voice" Don't you dare presume anything about me, especially that I am coward"

Hermione put a hand on his shoulder and warned "Harry!"

Harry calmed himself and shared a look with his partner and strode towards the spiders. The boy stepped forward to fight but Hermione stopped him with a hand on his shoulder. The boy tried to shrug her off but she only tightened her grip and said "I know you can fight and want to do so but let us deal with this. You just take care of your girlfriend who I guess is afraid of spiders"

The boy nodded but argued "How can you fight-

He never got to complete his rant as Hermione shut him off with a look and he reluctantly stood over with the blond with his sword raised for a fight. Hermione rolled her eyes but went ahead and stood with Harry at the center.

The boy looked shocked as he noticed that the first spider to attack got cut into half as Hermione slashed out with...wait a stick?He had no time to ponder over this as a spider came near them and he slashed with his sword but it just bounced off its skin. Suddenly, it blasted apart and he looked at Harry who was shouting strange words while waving his of them were too busy that none of them noticed that more Acromantulas had come and that they would be overwhelmed within minutes.

Then as on both boy and girl raised their sticks towards sky and shouted "lux splendida."

The boy had to avert his eyes as bright light flashed from the tips of the sticks of the duo and all the spiders scurried away till they were left alone. The two extinguished the lights and turned towards them.

The four looked at each other and asked at the same time "Who are you?"

The two duos looked suspiciously at each other before the boys looked at the girls simultaneously for guidance.

The two girls looked at each other and shared a look.

Hermione extended her hand "Hermione Granger"

The blond shook her hand warily "Annabeth Chase"

The girls looked at the boys expectantly.

The boy put his hand out "Percy Jackson"

Harry shook his hand reluctantly "Harry Potter"