Prologue: A New Black

Hi guys, this is going to be my first crossover. I know this has been done a lot but I have always liked the idea of Percy being a part of the Black family. With his name being a constellation and the general levels of sass seen both in Percy and Sirius, I just couldn't help it. Sorry if you're British and I butcher or use terms that are not so. I am thoroughly Southern so, my bad. Let me know what you think by reviewing!

I own nothing. All rights go to Rick Riordan and J.K. Rowling

3rd Person POV:

They all gathered around the table at Number 12 Grimmauld Place, waiting for Dumbledore to reveal why he had called an emergency meeting. While this was not an unusual occurrence for the Order of the Phoenix, the grave tone in which Dumbledore had sent the message had everyone waiting anxiously on the edge of their seats. Even the less serious members such as Sirius and Tonks sat silently, hardly moving. Finally, the man they all were anxiously waiting for appeared at the doorstep, dressed in robes that could only be described as eccentric. Those gathered stood in respect of the newcomer as he entered the kitchen, sitting at the head of the table opposite to the owner of the house. When everyone was seated again, Dumbledore began. "Before we talk about why I called all of you here today, I believe we need to rearrange some plans for Harry Potter's trial that is to take place in two days time. I had originally planned on accompanying the boy myself to vouch for his innocence but unfortunately circumstances have changed. I will need at least two of you to go in my stead so that he is not unfairly judged." Dumbledore looked around the room, an eyebrow raised and a mysterious twinkle in his eye.

Tonks stood up, sporting teal hair for the day. "I'll go, I have no problem protecting my cousin's godson," she said, sending a wink in Sirius Black's direction.

Dumbledore smiled kindly at her, but shook his head. "I thank you for volunteering, but I want your help in dealing with something else. Minerva has already agreed to go with Harry and after much thought I have decided that the second person should be Alastor," he said, the twinkle never leaving his eyes as he directed his attention to the one more commonly known as Mad-Eye Moody. Alastor shrugged, the eye that caused his nickname never pausing in its constant scan of the room. "Splendid. Now that Harry's trial is taken care of I would like to talk about another matter that has come to my attention."

The room stilled, the adults anxious to hear the news that Dumbledore brought. Just as Dumbledore was about to reveal the news, a loud crash was heard coming from the staircase, which of course woke the former lady of the house who began promptly screaming from her place in the portrait. Three people immediately rushed from the table-Remus Lupin and Sirius to close the curtains surrounding the painting, Molly Weasley to investigate the cause of the crash. The rest of the members waited patiently at the table, some chuckling as Molly severely scolded her twin sons who had been eavesdropping on the meeting with one of their new inventions. Eventually the portrait was quieted and the boys sent back upstairs minus their Extendable Ears and the meeting resumed.

"To get straight to the point," Dumbledore said, "I have lately been researching into the many different pureblood houses since many of Voldemort's followers seem to be pureblooded. Through my searching, it appears that I have found your long-lost nephew, Sirius." The twinkle seemed to intensify in Dumbledore's eyes at Sirius' horrified expression.

"My brother had a son?" Sirius sputtered, his shock making him unaware that he had knocked over his mug. Tonks patted him on the shoulder in consolation, but she appeared just as surprised.

"Merlin's Beard, no!" Dumbledore replied, clearly amused at the heir to the Black family's reaction. " I am talking about your sister's son. Apparently you had an older sister that when it became known to your parents that she was a Squib, she was given up to a muggle family for adoption, any memories people had of her being erased. I had originally believed her son to possess no magical capabilities like his mother, but having looked more closely into his record in recent times I think I might have been mistaken."

The room was silent as everyone digested the news. Sirius seemed to take the news the worst. A look of anger and guilt crossed his face before being quickly replaced with a mask of curiosity. "So has Voldemort already converted this nephew of mine?" he asked as he took out his borrowed wand and cleaned the mess he made off the table.

"Possibly," Dumbledore answered and the atmosphere in the room deflated, "but I doubt it." Dumbledore was then sent many looks of confusion. "He and his mother don't live in the country. But there is one way to find out for sure."

Dumbledore looked between Sirius and Tonks before continuing. "Since you two are the closest things he has to family that are in the Order, I believe you should accompany me to speak to the boy, and find out whether or not he is aware of the magical world."

"Is it wise bringing Sirius?" Molly asked, only to receive a withering glare from the man she was referring, "And pardon me for asking, but what is so important about this child that it requires missing Harry's hearing with the Ministry?" Several members of the Order nodded along with her.

Dumbledore's eyes gleamed again, and his response was only, "I am not sure, but something tells me that this boy is special. Tonks, Sirius," he addressed the two Blacks, "if you'll accompany me into the other room, I have a portkey waiting.

Line Break

On the day of Harry Potter's trial for using magic underage in the presence of Muggles, halfway around the world two people stood in front of an apartment door along with a large, black dog. Of course, unknown to everyone except his companions, the dog was in fact Sirius Black in his animagus form. His companions were just as unusual, an old man wearing bright purple clothes that could only be described as robes, his beard long enough to be tucked into his belt; a young woman stood beside him, sporting the features she had been born with-short black hair and regal features, wearing a shirt that said I 3 NY. After much conversing in the hallway. Dumbledore knocked on the door, Tonks and Sirius waiting slightly behind him. From inside the apartment, they heard a woman call, "Coming!" They group glanced at each other before waiting for the woman to open the door.

Finally, a middle-aged woman with brown hair was revealed as the door opened. She wore an apron over her clothes that seemed to have seen a lot of use. Her smile dropped as she saw the people standing at her doorway. "Oh. Hello, I wasn't expecting visitors today..." there was something in her tone that suggested she hoped they had arrived at the wrong door.

The old man stepped forward and held out his hand. "Hello, my name is Albus Dumbledore, and this is Tonks. We're here about your son, Perseus Jackson. Could we come in?"

"Of course" the woman said, "I'm Sally Blofis. And I would like to apologize in advance for whatever my son did. He hasn't quite grasped the concept of thinking before he acts." Tonks laughed at Sally's comment as the woman led them into the living room, where a man with salt and pepper hair sat on the couch grading papers. He looked up in confusion as they entered the room and shot Sally a look.

When everyone had taken a seat, Dumbledore spoke. "Might I ask where your son is? I believe he should be a part of this conversation as well. I assume you are the father," Dumbledore nodded to the man he now sat beside.

The man chuckled once before shaking his head. "No, I'm only his step-father. My name is Paul Blofis. As to where Percy is," he glanced toward his wife who sat across from him in a chair, "he is supposed to be home in the next couple of minutes. He has been at a summer camp these past couple of months that just finished this morning. Since it is also his birthday, he decided to have lunch with some friends before coming home."

Dumbledore nodded. "I also noticed that he seems to have been missing since Christmas. Was he at this camp the entire time?" he asked.

Sally responded this time. "No, he was with his father until summer started. Why, might I ask, do you want to speak to Percy? I know you said that we should wait until he comes, but it would be nice to know what this is all about." She glanced nervously at the front door.

Dumbledore said, "I am the Headmaster at a boarding school in Great Britain, a school that would like to offer your son admission to this upcoming autumn. We believe that he might have the qualities that we look for in all of our students."

Both Sally and Paul narrowed their eyes at the headmaster's comment. Finally, Sally said, "You traveled all this way to offer my son-a boy who has been kicked out of every school he has been to since kindergarten-a place at your school. What qualities does my son possess that make you so interested in him that you felt the need to travel all the way here to offer him a spot?" The magicians noticed how much more suspicious their hosts became at Dumbledore's proposal. Sally's fingers fiddled with the hem of her apron, and Paul's hand had turned white from gripping the pen he had previously been using to grade papers.

"Like I said," Dumbledore calmly replied, "It would be better to explain things once your son arrives." He laced his fingers together and placed them in his lap, leaning back against the couch. He took a deep breath in through his nose and asked, "Might I ask what you are making? It smells delicious."

Sally immediately shot up from her chair. "Sh-" she quickly broke off, remembering they had guests and blushed. "If you all will excuse me, I need to go check the oven. I'm making cookies for my son and I don't want them to get burned."

Dumbledore nodded graciously. "Of course not! You weren't planning on hosting us after all, so do not mind us," he said. He then turned to Paul and asked, "So you are a teacher? I couldn't help but notice that you were grading papers when we first came in."

Paul nodded. "Yes, but I'm starting to regret that decision based on these essays. I swear, none of these kids read the book I assigned, it's infuriating."

They continued polite small talk until fifteen minutes later the door opened, revealing a seventeen year old boy with raven black hair and startling green eyes. Considering his mother's features, the wizards were surprised at how much the boy resembled the Black family-the black hair, the straight nose and strong jawline. The only significant trait that stood out as not part of the Black family was the boy's sea green eyes. It didn't go unnoticed to the wizards how they seemed to swirl with power, nor how they immediately zeroed in on the three guests sitting in the living room.

"Percy?" Sally asked, standing up. His attention went to his mother as she rushed to where he stood in the doorway and crushed him in a hug. His arms wrapped around her as well and he rested his cheek on top of her hair. Finally she pulled back and said, "I've missed you so much Percy, look how much you've grown!"

He smiled slightly, "I've missed you too mom." He looked at the wizards in the living room and the blue cookies on the table. "Who are the guests?"

"Oh," Sally's excitement dampened a bit at the question. "They are here to see you, something about going to their school."

Percy looked at his mother strangely but shrugged it off and approached the couch where Dumbledore and Tonks sat with Sirius at their feet. He stuck out his hand to Dumbledore. "Hi," he said, a classic trouble-maker's smirk appearing on his face, "I'm Percy Jackson. Did you want a cookie?"