Demigods at Hogwarts (PJOxHP)

Chapter 1

On the day the seven and their friends received what would probably be their last quest, they were all sitting around the lake at Camp Half-Blood, watching the Romans go back to Camp Jupiter, the einherjar to Valhalla, and the magicians to whichever nome they belonged. The entire group was holding hands with their significant other, with the sun reflecting off the polished diamonds on the rings they wore on their left hands (If I went through what they did with my S/O, I would definitely put a ring on that. So all of them have engagement rings. Except for Hazel and Frank. They're too young. They get promise rings.).

They watched as their requests to the gods were put into effect. Frank no longer had to worry about fire, they could now spend the jewels summoned by Hazel, some of the Elder cyclops building shrines to honor all the gods and goddesses, and the ring that adorned Annabeth's left ring finger- courtesy of Percy's wish to Athena for her blessing to marry her daughter.

They laughed and chatted with each other, discussing their reunion plans as the Legendary Trainer of Heroes, Chiron approached, the sound of his hooves coming from far away.

He bowed his head towards Thalia, showing his respect for the newly made Eternal Lieutenant of the Hunt before turning to face the young heroes "My lady, my young charges, please follow me to the Big House. We have some matters to discuss."

All of Percy, Annabeth, Jason, Piper, Hazel, Frank, Leo, Calypso, Nico, Will, and Thalia grumbled at the thought of getting up, wanting to enjoy their last days together in peace. It was clear that this was not something they would get by following Chiron, for as his tone dictated, the matters he wanted to discuss would entail a quest. Regardless of this, they made their way to the Big House, tipping their heads to Dionysus as they entered.

They sat around the tea table in the main hall of the Big House. 

"Why have you called us here, Chiron?" Percy asked, getting straight to the point, tossing a snausage to Seymour the mounted leopard head, who snapped it up in an instant.

Chiron sighed before answering "First, let me finish speaking before you say anything. I invited you here as a favor - to you and from you. Let me start from the beginning. A long time ago, Hecate gave birth to some very powerful children. Their powers were as strong as Ms. Ellen's and Ms. Levesque's powers. These children figured out that they could channel their powers better through a wand, making them the first wizards and witches. They passed their gifts onto their children,  their connection to the gods getting weaker by the generation as did their powers. Most important of their descendants were two very bright wizards and two very bright witches. They went by the names of Godric Gryffindor, Salazar Slytherin, Rowena Ravenclaw, and Helega Hufflepuff respectively.

These four would go on to create one of the most prestigious schools of witchcraft and wizardry- Hogwarts. They divided their students into four houses based on their traits. These houses were named after their last names, so the four houses of Hogwarts are Gryffindor, Slytherin, Ravenclaw, and Hufflepuff. This is where you come in. Recently, one of my old students, a daughter of Athena by the name of Minerva McGonagall has contacted me, and informed me that the wizards and witches have gone through their own war,"

At this point, everyone in the room flinched. Every one of them had gone through two wars, some of them three, and they knew exactly the toll war could take on a person "For the students of Hogwarts, they are having some classes to help them heal. She wanted me to send a few demigods to Hogwarts to oversee their healing and recuperation. This is the favor I want from you. This is also a favor to you, as all of you deserve some time to relax and recover so this is like a vacation. The only trouble you might come across will be if the remnants of the army track you down. It should not happen, because there is a magical barrier around the school which keeps out monsters.

I know all of you had plans to go to mortal school and then to college. Should you accept, we shall make it so you will come back to the exact moment you leave once you are done with your business at Hogwarts."

Annabeth, being the ever-so-curious daughter of Athena asked "How will you achieve that? Not even Kronos has that much power over time."

"Well, my child, we have managed to harness two powers that are older and greater than the gods, two powers that transcend time and space and are even greater than Chaos itself." He intoned gravely "The powers of au-thor and pl-ot conven-ience."

"So, do you accept the quest?"

Everyone looked at Percy in affirmation and he nodded "We do."

"Lady Hecate will be coming tomorrow. She will bring with her books of all the years one through seven so you can study up the portion of years one through six as you will be entering year seven. She will also brief you on the war that happened. You have till September to prepare. You will be taken to a place known as Diagon Alley on the 30th of August to buy your wands and will go to Hogwarts by Pegasi.

Now, most of the spells the wizards perform will not have much-if any-effect on you as the magic that runs in your blood is simply much stronger than that of a wizard. The only three that will affect you to some degree are the three unforgivable curses- The Imperious curse, the Cruciatus curse, and the Killing curse. The Imperious curse is a mind control curse, easily resisted by demigods because of your higher will, the Cruciatus curse is also known as the torture curse, dealing immense pain. This is the only curse that will still affect you, but its effects will be dialed down. The Killing curse will knock you out instead of killing you. (I know this is cliche, but we all need a cliche every once in a while, don't we?)

While at Hogwarts, do not reveal yourselves as demigods unless it is a necessity. Remember, you are only there to oversee their healing process. This does not require you to reveal to them that you are demigods and we wish to avoid any conflicts. Now, go and enjoy the rest of your day. From tomorrow onwards, you will be studying relentlessly to catch up with the seventh-year students.