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Title: Percy Jackson, Ambassador of Hades – The Reign of the Underworld

Fandom: Percy Jackson and the Olympians / Heroes of Olympus; twisted version of PJatO

Disclaimer: All rights reserved to Rick Riordan for he created the awesomeness that is Nico di Angelo. And everything else related to Percy Jackson and the Olympians / Heroes of Olympus. Aside from the Gods, they belong to the old Greeks. This fanfiction and its OCs on the other hand are entirely mine. No money is made with this, though reviews are more than welcomed.

Warnings: shounen-ai, fluff, explicit intercourse, anal, oral, mpreg, arranged marriage, canon divergent, brief mentioning of child-abuse, shoujo-ai, hetero, threesome

Main Pairing: Nico/Percy

Side Pairings: Frank/Hazel/Leo, Reyna/Annabeth, Luke/Octavian, Ethan/Alabaster, Jake/Will, Damian/Liam, Sirius/Aurora, Grover/Juniper, Chris/Clarisse, Charles/Silena, Shane/Lacy, Malcolm/Katie, Jason/Calypso, Nathan/Gwen, Dakota/Leila, Bryce/Drew, Hades/Persephone, Thanatos/Triton, Ares/Aphrodite, Zeus/Hera, Paul/Sally

Percy Jackson Characters:

Camp Half-Blood: Perseus Jackson, Nico di Angelo, Tyson, Ethan Nakamura, Alabaster C. Torrington, Lou Ellen, Butch Walker, Clovis Daver, Luke Castellan, Chris Rodriguez, Travis Stoll, Connor Stoll, Cecil Rogers, Lacy Hunnigan, Mitchell Logan, Drew Tanaka, Silena Beauregard, Charles Beckendorf, Jake Mason, Nyssa Black, Shane McNabb, Leo Valdez, Frank Zhang, Clarisse la Rue, Reyna Avila Ramírez-Arellano, Annabeth Chase, Malcolm Cage, Katie Gardner, Will Solace, Rachel Elizabeth Dare, Grover Underwood, Juniper, Blackjack, Mrs. O'Leary, Plutonius (hellhound OC)

Hunters of Artemis: Zoe Nightshade, Bianca di Angelo, Phoebe Burge, Celyn Richards, Naomi Walters, Thalia Grace, Hylla Ramírez-Arellano, Piper McLean

Camp Jupiter: Bryce Lawrence, Octavian Simmons, Hazel Levesque, Jason Grace, Gwen Ryder, Nathan McIntosh, Dakota Elle, Leila Fisher, Mike Kahale, Tempest, Arion

Mortal Characters: Sally Jackson, Paul Blofis, Laura Blofis (OFC)

Own (Greek) Demigods: Liam O'Riley (Hecate), Aurora Desrosiers (Hypnos), Sirius O'Rinn (Morpheus), Lilian Martin (Morpheus), Damian Sturm (Eris), Robyn Pryde (Hermes)

Own Characters of the Next Generation: Hades Poseidon di Angelo (son of Nico/Percy), Grover Orion di Angelo (son of Nico/Percy), Jackson Tyson di Angelo (son of Nico/Percy), Chrysander Rodriguez (son of Chris/Clarisse), Esperanza Nicole Zhang (daughter of Frank/Hazel/Leo), Theobella Anna Chase (daughter of Reyna/Annabeth), Hercules Grace (son of Jason/Calypso), Balance Nakamura (son of Ethan/Alabaster), Marble Torrington (daughter of Ethan/Alabaster), Pyrrhus Beckendorf (son of Charles/Silena), Aglaia Beckendorf (daughter of Charles/Silena), Sedanur Aykan (daughter of Octavian/Luke), Trend Austin (son of Athena), Sam Raser (son of Ares), Derek Rhys (son of Demeter)

Godly Characters: Hades, Persephone, Poseidon, Triton, Hestia, Demeter, Thanatos, Olethros, Makaria, Melionoe, Hecate, Nemesis, Styx, Hypnos, Morpheus, Horkos, Charon, Atropos, Klotho, Lakhesis, Alecto, Megaera, Tisiphone, Chiron, Hera, Zeus, Dionysus, Artemis, Apollo, Aphrodite, Ares, Athena, Hephaestus, Hermes, Calypso, Ascalaphus, Zerberus

Summary: Poseidon knew about Gabe's abuse and he did not leave his son in the hands of this man. But he couldn't take Percy to the sea either, knowing his own wife would rather see the child dead than raise him herself. So he strikes a bargain with Hades – Hades would protect the child and in return, Percy would one day become the consort of one of Hades' hidden children, the di Angelos. Hades agrees and takes the boy in, raising him in the underworld.

When Percy turns thirteen, Hades sends him to Camp Half-Blood to aid Nico and Bianca on the quest in the Sea of Monsters. Percy Jackson, ambassador of Hades, changes the history, mixing things up that were not supposed to be mixed up at this point in time. Like Romans, for example.

Percy Jackson, Ambassador of Hades

The Reign of the Underworld

Epilogue: The Dark Sea and the Golden Boy

"I can't believe you roped me into a quest while I wasn't even there!"

Sander grinned and ducked his head as he followed his best friend, obediently and silently listening to Sam's chiding. Sam probably had a point there, but then again, Sander hadn't been the only one agreeing that Sam should be part of this. Marble had suggested it and Trend had insisted on it. Yet here Sander was, once again taking the brute force. That was just what he got for being too kind.

"Sorry about that. But don't act like you don't want to be part of the Great Prophecy", argued Sander. "Everyone who's been born in the last twenty years dreams of being part of the Great Prophecy and make our veterans proud. Would you really have said no, Sam?"

Sam frowned at him, forest-green eyes sparkling in irritation. He heaved a sigh and ran a hand through his mohawk as he shook his head. His very nice arms flexed at the motion and even Sander couldn't help but look. Sam was a looker, that one was totally out of the question. With his bronze-skin, the always a little too tight red sleeveless shirt, the pants that hugged his very nice ass very nicely and his eyes. Sander understood why Sam had a whole line of fangirls and fanboys, really.

"Obviously not. I'm not crazy. But... I mean...", drawled Sam doubtfully. "Can really we decide when it's time for a prophecy...? I mean, okay, so the prophecy does kinda imply we have to answer some call for stuff to start, but... Derek's not a fan. Just to warn you; he might try to claw your eyes out the next time he sees you for putting me in danger. The dork."

"Where are we going anyway?", asked Sander, lightly dismissing Derek's bad mood.

"The temple. If we're actually going to take this quest, I want to send some last prayers before packing it up", replied Sam with a casual shrug. "Can't hurt to ask some adult for blessing, right?"

The son of Ares had both eyebrows raised high as he looked at Sander expectantly. They reached the Temple of Heroes and went in. Both bowed their heads respectfully in front of the statues of the old heroes and walked the way to the statues of Lord Perseus and Lord Niccoló. Between their statues was a large fireplace where people could burn offerings and prayers. Sam unwrapped a piece of blue cake. Sander blinked slowly, both eyebrows raised. Sure, everyone knew from their history books that Lord Perseus used to love blue food as a mortal. Sam threw the cake in the fire and folded his hands in prayer as he closed his eyes. The temple darkened and Sander wrapped his arms around himself. Considering that both Lord Perseus and Lord Niccoló were gods of the underworld, the temple always gave Sander the creeps. The shadows seemed to come alive, curling like smoke or like ink in water. They thickened and Sander was absolutely sure that this was so not normal.

"Sam... uh... Sam, something's... not right", stated Sander a little high-pitched.

"Sh. Praying", growled Sam irritated, stepping onto Sander's foot with one of his own.

Sander winced and marveled at how well Sam's aim was, even with his eyes closed. The shadows opened up and two hellhounds stepped out of them, floating above Sam and Sander in the giant temple. Plutonius and Mrs. O'Leary – the carriers of the chariot of Lord Perseus and Lord Niccoló! Sander's heart skipped a beat. Normally, gods didn't exactly make an appearance when prayed to.

"Sam. Dude. Really. Seriously", grunted Sander, dodging the elbow from Sam. "Seriously."

Sam cracked his eyes open, but mainly so to glare pointedly at Sander. At least until he noticed the two hellhounds pulling a chariot. Sam's eyes widened comically as he stared up. Sander mirrored the expression. The hellhounds carried the chariot down – it was a beautiful chariot, Stygian iron, silver and decorated with sapphires and shells. It touched the ground and Sander's throat tightened.

"L—Lord... uh... Perseus?", tried Sander doubtfully.

He wasn't really sure. Sander knew pictures of both the gods, from his history books and from the private photo books of his mom. But this god kind of looked like... both of them? Sander was confused. Also, confusingly flustered – because wow, this god was a real god, like how one would picture a Greek god. Absolutely gorgeous. With sparkling sea-green eyes, bright and intense and as though the green and blue were actually moving like waves in those eyes. His skin was olive-colored, a mess of dark curls on his head that looked soft and fluffy. He sure wasn't tall, more like short and cute. Not the least bit intimidating like a god should be – well, his intense gaze aside.

"Nope. Sorry, neither Lord Perseus nor Lord Niccoló can take your calls right now because they're on a well-deserved second honeymoon", chimed the pretty god with a mischievous smile.

"And... who... are you?", asked Sam skeptically, eyebrows knitted.

"I'm Donny, Ambassador of Percy and Nico in their absence", chimed the chipper god.

"Uh... Lord... Donny?", tried Sander carefully, drawing a blank on that.

Donny rolled his very beautiful eyes, an amused grin on his lips. "Lord Hades Poseidon the Second. But considering there are two other very popular gods using those names, I really prefer to go by Donny. Also, 'lord' sounds so... old. Old gods like my parents would do that."

"Uhm, your... parents...", drawled Sander out awkwardly, still staring at the pretty god.

"Percy and Nico. Sorry, Lord Perseus and Lord Niccoló. Which, ironically, they really don't like", hummed Donny and tilted his head, watching Sander. "Like I said, second honeymoon for them, so as their oldest son, I figured I could take a call for them. Now, what's up?"

Sam blinked doe-eyed before exchanging a look with Sander. "Uhm, well, we... We and our friends decided to take on the Great Prophecy and I had hoped for a little advise from the heroes of the last Great Prophecy, to be honest... I mean, we are so totally gonna do this and all, but... We've never done a quest that size, you see. I thought, maybe they'd have some... input."

Donny looked at them for a moment and Sander started feeling fidgety under his intense eyes. "Well, mamma would probably say 'just do what feels good and always have each other's backs'. And papà would agree with him. But if you want some help, I'm currently not too busy."

Sander felt like something was dropping in his stomach. Did a god seriously just offer them his help? A very, very pretty god at that? But now Sander was a little confused. The prophecy said seven. Well, the prophecy said seven half-bloods, so maybe gods didn't count...? Or... was this the call? So far it was just a crazy little idea that seven demigods had spun up, but absolutely nothing was set in stone just yet. It was just a suggestion from a crazy little witch. But if a god supported the idea, that made it semi-official, didn't it? Sander blinked wide-eyed.

"Okay", said Sander without wasting another second to think about it.

/break\

Donny was grinning delighted as he sat on the figurehead of the Happy Dragon – a truly magnificent flying ship. As was expected from his cousin. Not that Donny even knew his cousin. He knew aunt Hazel, uncle Leo and uncle Frank, but mom and dad were way too protective, worrying about how mortals died and how meeting the legacies would inevitably break the hearts of Donny and his siblings. The thing was that Donny was very much like his mom; if someone told him not to do something, he just wanted it even more. Besides, the two heroes he had met at the temple yesterday? They were interesting. The pretty one was amusing – strong Ares blood in him, but an even stronger heart that would make Aphrodite proud – but the handsome one? Oh boy. Donny's cheeks heated up. His aura read as Hermes and Ares blood mixed, definitely strong too. And good looking and cute. The seven had gone to get their stuff and say goodbye to their families. They had agreed to come here and meet up at twelve. Sam and Sander were the first ones to come, apparently right in the middle of talking about something.

"So, you had problems telling your parents?", asked Sam casually as they climbed onto the ship.

"Yeah. I mean, you know my mom, she's all for glory and fighting. She thinks it's due time I make my mark. I had a way easier time convincing her than like most of the others. Calypso is totally worried about Hercules, while Jason thinks it's a great opportunity and that they shouldn't stop him from being a hero. Reyna and Annabeth are 'reluctantly supportive' of Thea taking the quest. Ethan and Alabaster... have less arguments against Marble going than Marble's big brother does, actually. And I think Esperanza has the hardest time. You know how easily Leo worries."

Donny smiled faintly; that did sound like uncle Leo. "Hey, guys. So we're going to leave soon?"

It was amusing to watch the two heroes jump about half a meter into the air. Sander turned to look at him like a startled puppy – he had pretty nougat-brown eyes. Donny really liked those eyes. Plutonius and Mrs. O'Leary at Donny's feet lazily lifted their heads to watch the startled heroes.

"Y—Yeah. As soon as the others arrive", nodded Sander awkwardly. "But where do we even go?"

"We are going to figure that out as soon as we get in the air", declared a fierce female.

Donny turned to watch the other crew members climb up. A pretty Latina with a bow strapped to her back, followed by another Latina with a blue baseball cap tugged into her jeans, two blonde boys, one with glasses and one with what looked like a copy of the Aegis shield in, a freckled brunette girl that seemed to be the youngest of the bunch and lastly a pissed-off brunette boy.

"That's our crew", declared Sander, chest puffed out in a cutely proud way. "Our captain/navigator Esperanza Zhang, our strategists Thea Chase and Trend Austin, our legacy of Jupiter, Hercules Grace. Our local witch Marble Torrington and a very stubborn son of Demeter – Derek Rhys. Guys, this is... Donny. The ambassador and son of Lord Perseus and Lord Niccoló. He offered to help us."

Donny took them in slowly, placing their last names with the names of his parents' friends. It was so exciting to finally meet them. To finally go on a real adventure. Oh, his parents were going to be furious for sure, but hey – he could work the sad kitten-eyes pretty well.

"But, uh, you do know you're eight half-bloods now?", stated Donny skeptically.

"Oh, I am not part of this quest", declared Derek with an irritated glare aimed at both Sander and Trend. "I'm just here to make sure my Sammy comes back in one piece."

Sam flushed a little at that and rolled his eyes while Trend huffed in a very agitated way. Huh, this crew looked like it was going to be fun. He turned to look at Sander. A lot of fun.

"Well then, I know where to start. I know where the Doors of Death are", chimed Donny.

"...You... do?", asked Thea surprised, staring at him startled. "How? I've been wrecking my brain and all resources I had to find something out about them! Not even Daedalus' laptop could help."

"Well, I'm a god of the underworld", stated Donny mischievously, tilting his head.

"Oh, this is gonna be good", declared Esperanza eagerly, a fire in her eyes. "Let's get this ship off the ground then. Everyone, take positions! Where are we going, little lord?"

Donny huffed at that nickname, grinning just a little bit. "Epirus. In Greece. There's a temple for my grandpa there and that's where the Doors of Death are located in the mortal world."

"Greece? Wicked", hummed Marble with a mischievous look on her freckled face.

Donny grinned pleased as he surveyed the crew. He was so looking forward to getting to know them all better and going on this adventure with them. His eyes flittered to Sander. He was going to be especially interesting, or so Donny thought. He seemed very pure, in lack of a better word. Loyal, humble, sweet and also totally adorable, but still strong and brave. Or that was how his aura read, at least. Donny couldn't wait to see all of what he had read in the aura put to action.

"So, you prefer to go by Donny, no fancy lord and all?", asked Marble curiously, popping her gum.

"Yup. For this, I'm just... one of you guys", confirmed Donny with a grin. "I mean, you got any idea how annoying it is to be the grandson of Poseidon and Hades? All the doting and stuff. Meh. I want something... real. A real adventure, a real... normal teenage-experience. Just once."

"Whole package deal includes stupid crushes, unnecessary tantrums and disobeying the parents."

Donny's eyes wandered back to Sander, who was laughing with Sam. He wouldn't mind a little crush. And the parents-thing was also covered. Their biggest adventure was just awaiting them.

~*~ The End ~*~

Author's note: Aaand that is it. Wow. Can't believe it took me so long to finish this story. Started writing this story in October 2014. More than two years ago now. Thanks for reading this and even more so for reviewing; reviews are after all what keeps me posting ;)

This story is a total of 200 pages long. And I love it. I mean, to be honest writing kiddo!Percy being raised by the underworld was the most fun and I do consider it one of the cutest things I've ever written; it was also a fascinating character study on Percy. I enjoyed writing this different dynamic to Nico and Percy. And I love to see how my next gen would have unfolded in this different universe (there would be A LOT of blushing Sander, because god!Donny is far more confident and comfortable with himself than demigod!Donny, so he'd be quite the tease and very forward in what he wants).

Now, I kind of couldn't resist this last little tidbit of an omake though, to be honest:

/omake\

"...You lost one of my children? We were only gone for two weeks and you managed to lose one of my children."

It was a slightly amusing sight to see the great king of the underworld ducking his head like a guilty school boy and perhaps Nico would have laughed at the picture his father painted. Perhaps, if he wouldn't be wholeheartedly agreeing with his consort and love. Percy was glaring fiercely at Hades.

"You have eight of them. It's hard to keep count", tried Hades. "And managing to somehow keep them all contained while also ruling the underworld isn't exactly easy either, bambino."

"Oh, please. Nick and I manage too", huffed Percy and crossed his arms over his chest. "I will tell mamma about this and let's see how much you'll manage to defend yourself about losing one of her precious grandchildren then."

Fascinatingly enough, Hades managed to shrink some more at the threat of his wife learning about this. Nico heaved a sigh and ran his fingers through his hair. When him and Percy had returned from their second honeymoon, six of their children had happily greeted them. That Bianca Maria was with the hunt was obvious, but Donny should have been there. Alas, he wasn't. There was a distinctive lack of Donny - and Percy did not take that too well.

"The Fates said he took a quest. In New Olympus", tried Nico to sooth his raging sea.

It didn't help. If anything, Percy's aura flared up with more anger at that. He shook Nico off to point an accusing finger at Hades, eyes dark as the sea during a storm.

"My baby took on a quest. I leave them alone with you one time and my son ends up on a quest? H-How... That's it. I am done. Honestly, how did Makaria, Melinoe, Leo, Tyson and I even survive with that kind of supervision is beyond me!", exclaimed Percy, waving his arms around wildly.

That being said, Percy stomped out of the room, muttering something about talking to Apollo about this mess. Hades carefully stared after his boy before turning to Nico. Nico too looked irritated, but by far milder than his consort.

"You think he'll be mad for long...?", asked Hades slowly, rubbing his temples.

"Depends on how that quest goes for our son", pointed Nico out, both eyebrows raised. "But if I were you, I'd go and seek shelter in a safe distance to Percy. And Persephone. And Poseidon. And Paul and Sally."

Hades winced slightly. Maybe it was time for a little vacation of his own. After two weeks of being tortured by his six too energetic grandchildren, he sure deserved it. Somewhere far, far away from the underworld...