Standard Disclaimer: I own nothing in regards to Harry Potter or Invincible. All properties therein are those of their creators. I am only a writer working on my skills with worlds and characters that I love.

Note: Was reading the comics for Invincible to prep now that season two has officially been announced for 2023. The idea came to me then, what would happen if Omni-Man played the field a bit before settling down with his wife? What if his enhanced senses picked up his first born son alone on a doorstep in Surrey? A Viltrumite can't grow up in an environment like that. What happens when the Tri-Wizard tournament starts and the cup summons a half-Viltrumite that shares his father's dream of world domination?

Note: In this story the age to enter Hogwarts is a little older. Ergo, when Harry gets called by the Goblet he'll be eighteen, the Hogwarts students' final year.

Note: I'm working off the concept that Harry's Viltrumite blood was strong enough to completely overpower his wizarding half. As Nolan will often remark, he's a prodigy and that is kind of why. What this means is that Harry will not have inherent magic of his own, nor will he carry a horcrux. Dumbledore just thinks he does. Why am I doing this? Because I've written a lot of magical Harry stories, and I like the idea of this one just beating all of magical Britain to a pulp if he wants. Why use magic when violence is more fun?

Chapter One - Fathers and Sons

Nolan Grayson, or Omni-Man as Earth had come to know him, floated in the upper atmosphere of the planet. It had become a habit of his, listening to the ambient chaos of earth and deciding which crimes were the most important to attend to, and which to let be for the other heroes of the planet. Certainly the Guardians of the Globe could afford to step up and handle their share. This pure level of… discord and disorganization proved to him more and more every day that the Viltrumite vision of the future was the right one. Now he only needed to bide his time, earn the trust of the populace, and discover all of this world's weaknesses for his people's eventual invasion and absorption of the human race into their empire. It was for the best really. Humanity would gain their advanced technology, medicine, and military might, while also benefiting from their strict system of order and governance. All of this chaos would be at an end.

To that end he'd formed a cover befitting his new station as one of the world's greatest heroes. To many he was a god amongst men, fighting for the good of the population. The government saw him as an asset that supported their interests worldwide. And his girlfriend… Nolan had honestly not expected to fall in love on this planet. He'd hoped at most to find a temporary mate, further his bloodline, and move on. It only made sense considering how quickly humans aged compared to his kind. To that very end he'd dated casually across the globe, but when he'd met Debbie everything had changed. She saw him, understood him, and accepted him powers and all. Honestly she'd been the first and only person so far, aside from his government liaison, who had pieced together the fact that Nolan Grayson the writer, was actually the world famous superhero.

She'd claimed the mustache was a dead giveaway, but if that was the case then why had no one else figured it out yet? He took it as a sign that she was leagues and bounds above the rest of her species, a fact she continued to prove with every encounter they shared. Now, almost a year after their first meeting, Nolan actually found himself planning to propose to her. It was insane, but it felt… right.

His calm musings were suddenly broken up by a shrill wailing that pricked at his ears and sent his eyes popping nearly out of his skull. What was that? And why had it cut through every other bit of ambient noise? Deciding to check it out, he rocketed through the sky, following the curve of the earth on his fastest velocity until he ended up in the clouds over England. He wasn't sure of the exact location, but the solidarity of home design denoted a suburban area. Searching rapidly he tilted his head to give his ears the best possible angle. The crying became louder than ever, and from this close a distance it wasn't even a challenge to track it at last to the source.

A rather mediocre location marked as number twelve privet drive came into the superhero's sights as he glided through the streets and came to a stop. There, sat alone and miserable in a basket on the doorstep, was a wailing toddler clawing at the lone blanket keeping it alive in the November chill.

Now, warrior and conqueror he may be, but Nolan was not heartless by any means. He soared across the decently maintained lawn and landed a few feet away from the child before taking a knee and whispering softly to it, hoping he'd calm down. To his surprise, the little one did. Brilliant green eyes latching onto his own blue ones. An instant later the alien felt a sudden lurch in his chest and he gasped for breath, not once looking away from the child that could not be more than a year old by his estimate, until he'd managed to get a hold of himself. If that had been what he thought it was… With shaking fingers he reached into the basket and pulled out the lone envelope inside.

Flipping it open and removing the document he read it over quickly before dropping it with nerveless fingers and almost falling over from his shock. His guess had been right. Long ago on Viltrum, his father had told him of the bond that was formed between a father and his first born son when they locked eyes for the first time. It was a visceral, physical, and emotional thing that tied the two together. Now, with the contents of the letter clear to see, that fact was even further confirmed. It stated that the boy's mother was none other than Lily Potter nee Evans. Yes, he'd met and had a physical relationship with a woman that bore that name a little over a year ago. She'd been having troubles with her husband, having married too soon right out of school, and had been looking for an outlet. It just so happened that he'd had a thing for redheads at the time and he'd yet to meet Debbie. One thing led to another and the rest was history. It had been a short affair, but the results were here staring him in the face.

Slowly, gently, he lifted the boy into his arms and held him close. Harry, that was his name according to the letter, and his parents had been killed by a madman. That was certainly unfortunate, but Nolan found himself wondering if the name was a sign. Harriet had been the name of his mother, and he vaguely remembered mentioning that to Lily as they lay tangled together in the morning light all that time ago.

Now that he was this close, Nolan could also hear the thick blood flowing in the toddler's veins, he could feel the denser than normal skin under his hands, and he could see the fluctuation of light around its eyes. This boy was Viltrumite to the core, and there was absolutely no doubt in his mind that he was his. That did raise one singular question however, what now?

He certainly couldn't leave him here. A Viltrumite needed the attention of a parent to lead him down the right path. To train them to best uphold the mandate and interests of the empire. So of course little Harry would need to come with him and be raised as the warrior legacy that he certainly was, but what would that mean for Debbie? She loved him, he had no doubt of that, but was she ready to accept the child of another woman? It would be a deal breaker, but she deserved the chance to make that decision for herself.

Nodding to himself, Nolan slowly rose back into the air, supporting the toddler's head on his chest as it fell back into an easy slumber. Hm, it seemed the motion of flight soothed him. Good to know. His first stop was his private lab where he kept the bits of Viltrumite tech he'd arrived on Earth with. It was completely hidden from every government and hero on the planet. There, he performed a quick blood test (if he believed in anything it was redundancy) and confirmed once and for all that little Harry was indeed his son. Then he sent a text to Debbie.

*** Sorry for the late text, but I've gotten some pretty massive news, and it will affect us both. Can you meet me tomorrow at that cafe on fifth street?***

It took a couple moments for a reply, but Debbie agreed to meet him at the requested time, and he gladly shut down his phone and turned back to the still slumbering infant. He supposed now was a good time to flit around the world and find the finest baby toys and supplies he could procure. Only the best would do for the product of his genes after all.

The Next Day

Green's Cafe was a small hole in the wall location that served the world's best coffee (in his humble opinion). He and Debbie had gone there for their first date, as she'd rightly assumed he wouldn't want to be in a large crowd during their time together. The staff was professional and kept their noses out of their customers' business, which was certainly ideal for the conversation that was about to take place.

Nolan had procured a high end stroller for Harry, and the little one was snoozing contentedly next to him as the door opened with a jingle and Debbie walked in, smiling as she saw him. In that moment, she was perfect to him. Raven black hair, a face that seemed carved by the angels themselves, and a body that was impossible to look away from.

She made her way over to him and slid into a seat right beside his own at the small table, taking his hand. She'd not seen the stroller yet. "Nolan, are you alright? You sounded strange on the phone."

Steeling himself, the Viltrumite conqueror reached into his pocket and placed a small box on the table.

"Oh my god, Nolan!" Debbie gasped and reached for the box, only to stop as he cleared his throat.

"Debbie, I wanted to put my cards on the table here. That box represents my feelings for you. I want to marry you. I want to spend my life with you. But last night I discovered something… shocking." He reached back and pulled the stroller into view. As his girlfriend's eyes went even wider than the ring reveal he explained, "Before I met you, I was involved with an Englishwoman named Lily. It wasn't serious, and we only met a few times, but apparently this was the result. I only found out about him last night when his cries connected to me on my flight. Apparently both Lily and her husband had been killed."

"A-Are you sure that-"

"I performed a blood test in my lab. He's definitely mine. Please understand, I want to marry you, but I can't leave this little one alone. He needs me. Wedding me would mean committing to having him in your life too. Can you be okay with that? With raising a child that isn't your own?"

To her credit, Debbie didn't answer immediately. He could see the wheels turning in her head as she considered her situation before her gaze drifted down to the sleeping toddler and a warm smile crossed her mouth. It helped that she could easily tell the boy's age by his size so she knew Nolan hadn't cheated on her. And deep down she knew that this revelation didn't really change the way she felt about the man. Finally she said, "Well, I always did want to be a mother, even if this isn't the way I saw it happening. What's his name?"

"Harry."

"A fine name for a boy."

"Yeah." The god amongst men ran a gentle hand through the boy's hair before opening the box on the table and holding up the ring. "Debbie Okoye, will you marry me?"

"Yes!" The exclamation she gave probably annoyed the other customers, but she was too busy shoving her tongue in her boyfriend's, no, her fiance's mouth to care. When she finally pulled away she asked, "Can I hold him?"

"Of course." Nolan gently lifted the toddler out of his stroller and passed him over to the cooing woman he'd decided to marry.

"Hello, little Harry." She murmured sweetly, "You don't know me yet, but I'm your mommy now."

Contrary to years of conditioning and experience, Omni-Man felt a stirring of warmth at the sight of this woman accepting his spawn as her own, and in spite of himself he felt like he was looking forward to domestic bliss.

Four Years Later

Harry Grayson sat nervously in the waiting room of the hospital with his aunt Lucy. On some level he knew what was happening. His mommy was making him a little brother, but what he didn't understand was why it was taking so long or why he had to wait out here.

"Auntie Lucy, how much longer?"

The brunette smiled down at the little one and said, "It shouldn't be long now." They'd already been waiting several hours after all. It had been a great shock to her family when her big sister had married Nolan Grayson. Not because of the wedding, but because she'd married a man with a son from a previous relationship. To be honest, most of them were worried she was biting off more than she could chew… until they'd seen Debbie with the little boy. The pure love in her eyes and the way he clung to her sold them all on the truth of the family that had been created.

And now it was growing. Looking down at her beloved nephew, Lucy delighted in the hopeful expectation on his face. Harry was an incredibly inquisitive child and he was always looking for new information about the world. When he found out he was going to be a big brother, well, he'd faced that with the same level of fascination, asking everyone in his family what he could do to be the best big brother he could be. It was honestly adorable. Almost as adorable as his beautiful green eyes. He had a strange scar on his forehead, but supposedly it came from the accident that killed his mother and her husband.

She gently ran her fingers through his hair to stop his foot from tapping a hole in the floor. He leaned into her touch and melded into her side. Harry was such an expressive child, and he loved physical affection; an attribute that made him absolutely darling to her entire side of the family.

A short time later Nolan came back out dressed in a set of hospital scrubs that could not hope to hide his muscular build. "Harry, are you ready to meet your little brother?"

The boy chirped his affirmation and ran up to the big man, taking his hand in his own as he'd been taught to when out amongst strangers. Lucy was quick to join them and together they made their way back to the delivery room where a clearly exhausted Debbie was reclined on a bed with a small bundle asleep in her arms. Harry was at once entranced by the sight and he quickly scampered over the floor to a nearby chair, dragged it over to his mom, and climbed up until he could stare down at it.

These actions earned rounds of laughter from all present, and Debbie said, "Harry, this is your little brother, Mark."

"Hello, Mark." the little boy squeaked out.

Stepping in to join the two, Nolan said "Being a big brother is a big responsibility. Especially where I come from. Think you can handle it?"

The boy nodded so seriously that everyone laughed all over again. Meanwhile, Debbie ushered Harry around to her free side and snuggled him against her body so she could wrap her free arm over his shoulder.

"Mmh, both of my boys snuggled up with me. This is heaven." She sighed blissfully.

"I think you mean three." Nolan smirked as he took Harry's vacated chair beside her. "Though I'll save snuggling you myself for later."

"Thank you, Nolan." Debbie smiled wider, even as her eyes began to droop. "For this life, for Harry, for everything."

When she was finally asleep Lucy left them alone, and the man known as Omni-Man sighed almost sadly. "Don't thank me, Debbie. Not with what's coming."

Five Years Later

"Well," Debbie noted as their ten year old son floated in circles around the ceiling fan, Mark hugging her leg in shock, "I think it's safe to say Harry definitely takes after you."

"I'd say so." Nolan proudly declared, grinning widely up at Harry as he held out his arms. A second later the boy descended down into them and he spun him happily around the room. "And he's a natural!"

"D-Dad?" Harry asked when the big man finally ceased his motion. "How did I just do that?"

The mustachioed man set his first born down and took his hand in his own. "Come with me and I'll explain everything." He gave his wife a patient smile and she nodded, picking Mark up and taking him into the kitchen to keep working on dinner. Meanwhile, Nolan was sitting his son next to him on the edge of the roof and staring at the sunset. He'd honestly not expected to need to have this conversation yet, as most Viltrumites started accessing their abilities during puberty. It was just another sign that his boy was a prodigy in his opinion. Now, how to go about this? He observed the carefree expression on his son's face and the way he was casually kicking his feet out into the open air.

He'd planned on telling Harry the truth eventually of course. Mark too. But was he still too young now? Remembering how he'd moved in flight, like a leaf on the wind, answered that question for him. Harry was a Viltrumite, through and through, and it was only right that he be made aware of his purpose and true loyalty as soon as possible so he could begin training to eventually conquer this world at his side. Mark could be told when his own powers started to manifest.

"Harry, what I'm about to tell you is a big secret. You know how to keep those right?"

"Yeah, dad."

"I'm serious, bud. You can't tell your friends at school, you can't tell your mom, and you can't tell Mark when he gets bigger. This is between you and me."

"But mom saw me fly."

Nolan nodded, "She knows about our powers and some of my history, but what is said here stays here. I'm trusting you with a lot, son."

Harry, still far more serious than his age should allow, agreed, and Nolan began.

Shaking himself he said, "This is gonna be a little… awkward, for both of us. You may have noticed that I'm not like 'normal' dads. I move really fast, wear a skintight suit with a cape, and you've probably seen someone that looks like me on tv saving the planet a few times by now. I think you're old enough, and your powers have come in strongly enough, for me to tell you where I really come from."

"Really?"

"Yes, and this is the stuff you cannot tell anyone. Billions of miles from here, out in deep space, is the planet Viltrum. It's a cool, blue, oasis of calm and security, much like our own. Unlike Earth however, there is no inner strife, discord, or corruption. We purged that from ourselves long ago, and now we work to do the same with the rest of the known galaxy. I was sent here to eventually bring Earth into the Viltrum Empire so that we can share our advancements with mankind."

Harry gave his dad a wide-eyed stare at those words. "Is the empire good?"

"It's amazing, Harry." Nolan added enough inflection and energy to his voice to make his boy smile. "We have advanced construction techniques, faster than light travel, medicine beyond what any human could possibly comprehend, and a military like no other to offer universal defense for the planets under our control."

"Wow!"

"Wow is right, son." Nolan was glad to see the open appreciation on Harry's face at those words. Yes, he'd made the right choice telling him the truth of his mission. "Earth is kind of a big mess right now. You've seen how often I go out to save it right? So you can see how important it is that Earth joins Viltrum, can't you?"

"Yes, dad."

"Good, because someday you are going to help me make that happen. It's our mission."

"Our mission?"

"Yes, as Viltrumites it is the mission of all our kind to bring as many worlds under our banner as we can. I'll need your help with that."

"So-So I can actually help you with your work?" Harry looked so damned hopeful when he asked that question that his dad couldn't help ruffling up his hair before answering.

"Of course. It'll be a nice father-son project for us. And Mark too once he gets his powers and learns the truth. We'll need to tell him a different story until then though. The same lie I told your mom, for their safety. I can't keep the fact that I'm Omni-Man from him for long after all."

Harry took a little while to absorb all of that before noting, "I can fly, I guess, but what else can I do? Am I really that different from humans?" He was worried about standing out too much from his friends.

Easily picking that up, Nolan said, "Well, humans are actually a lot like Viltrumites, except we can fly, move super fast, and we're incredibly strong. Just you wait, by the time you're in your teens I'll have you bench pressing skyscrapers."

Harry looked down, bunching his hands into fists. "This is a lot, dad. Your mission is so big and I'm just… me."

"Hey, look at me." Nolan wrapped his arm around Harry's shoulders and tilted his chin up until they were eye to eye. "You're everything I could ever want you to be, and you come from a proud legacy, so please, don't ever doubt yourself or your worth like that. As for our mission, it isn't really on a time crunch. We have time, years, decades even, if we need them. There is more than enough time to train you up right."

"Thanks, dad. I mean it."

"No problem, son." They sat in silence for a while more, watching the sun dip ever further down the horizon before the adult cleared his throat once more, "There, uh, is a bit more we should probably talk about."

"Really? What?" Harry was eager, expecting more bombshells about his lot in life.

"Nothing crazy like before." Nolan waved a hand to ease his expectations. "Your mother just thought… and I agreed… that when we told you and Mark about me, that, well, it would also be a good time to have another difficult conversation. Look, in a few years you're going to hit puberty and you'll be noticing some changes… in your body."

"Alien changes?"

"No, no, these are changes that both my species and humans share. You might notice your voice changing pitch, you'll start to grow hair in some strange places, and girls are going to be a lot more interesting."

"What?! But girls are gross."

Nolan laughed out loud at that statement and replied, "You think that now, son, but just you wait. Things will get weird for you, but I want you to know that I'll be here every step of the way when you need to talk about it. Now, generally what you can expect from puberty is-" That revelation eventually turned into the 'Talk' and carried on for quite some time, leading to a very shell-shocked father and son that came down to the dinner table. Much to the amusement of their wife and mother.