Full Title: Five Times Darth Omnus Found Out He Had a Son and One Time He Succeeded in Turning Izuku to the Dark Side

Author's Note: Full credit goes to Goofy Boss for this wonderful BNHA Star Wars AU. Thanks so much for letting me play in your sandbox! Any logical inconsistencies are my own responsibility. Each chapter of this story will explore a different AU of the Star Wars AU in "Ghost Run." None of the background information I created is canon for their Star Wars fic.

Remove the spaces to get a link to Goofy Boss' Ghost Run:

archiveofourown.

org/

works/25672957/chapters/62329264

Chapter One:

Hisashi Shigaraki couldn't believe he'd been dragged to Tatooine of all the absolute hell holes. He'd vowed to never set foot on the armpit of the galaxy ever again. His childhood memories of the place were not fond, largely involving slavery and lots of sand in uncomfortable places.

But Emperor Mera had ordered him to find and kill the Hutt who'd been looting imperial supply ships. His Majesty had done it in front of the Senate, where Hisashi still wore the mask of Darth Omnus, loyal right-hand man to the emperor, instead of the true power behind the throne. He hadn't been able to refuse the order in such a public setting.

Hisashi strode down the deck of his Star Destroyer, his dark cape flowing behind him. The Stormtroopers cowered away from his skull-faced mask. When one failed to move out of his way fast enough, he crushed the man's throat and tossed him against the wall.

All the random violence was part of his image as the barely-controlled imperial attack dog. The bad cop to the emperor's good cop. Of course, he quite enjoyed killing people. The death fed his power and slightly restored his mood. Slightly.

Hisashi had installed Emperor Mera as his latest puppet after the last politician he'd used in the position got uppity and wound up with a lightsaber to the neck. The man had seemed calm enough to make a good public face and unambitious enough not to cause trouble. Maybe having the illusion of absolute power might be going to Mera's head. Maybe he'd be the next person to be found with a mysteriously crushed throat.

If only Inko hadn't died. She'd have been a much better empress, and he could have made himself emperor through marriage. His poor, darling Inko, lost with his unborn son.

Tears stung his eyes under his mask. Tatooine must be getting to him, making him lose control of his weaker emotions. Rotten garbage wasteland.

As his ship emerged from hyperspace, Hisashi reached out in the Force, groping for the trail of deaths leading back to the pirating Hutt. The sooner he got this over with, the better.

He stopped. He froze. He detected a very, very familiar presence in the Force.

It felt faint and suppressed, just a whiff on the desert wind. But even the tiniest scent was unmistakable. From the moment he'd first held his infant brother in his arms, a Force bond had solidified between them.

Hisashi nearly stumbled from the old ache where the Jedi had severed his bond with his little brother. All because they couldn't let the "Chosen One" have such strong attachments. He'd hated them for it. Even back at his young age, he'd resolved to one day use his prophesized power to choose a different path than theirs.

Immediately, Hisashi clamped down hard on his own presence in the Force. He had zero intention of letting his younger brother detect him and flee. Unbelievable that Kazuki had been any more willing to return to Tatooine than him—but his brother always had a masochistically self-sacrificing streak. It went with the stubbornness and foolishness.

Today had just taken a turn for the better. Hisashi started humming. Stormtroopers got out of his way even faster. Approaching the bridge, he ordered a course change. No one dared argue with him.

Hisashi approached the tan synstone building. Although outwardly alone, he'd ordered his troops to surround this area on all sides. The round building was covered in dirt and the speeder outside looked like a hunk of junk. Apparently his foolish little brother had as little taste as ever.

A new presence, brilliantly blazing in the Force, struck him so suddenly he nearly tripped over a rock. Wouldn't that be undignified?

He flicked a bit of dust off his cape and focused. A second Force-user was inside the hut. Young, but very strong.

Had his foolish younger brother taken on an apprentice? Hisashi's eye twitched. He'd never let the despised Jedi revive. Maybe this child could be a hostage to use against Kazuki. Or maybe he'd just kill the apprentice to punish his younger brother for past errors.

Stopping just before the front door, Hisashi let the shields hiding his presence drop.

The sudden spike of panic from his brother's Force signature was quite satisfying.

The door flung open. Kazuki Shigaraki still favored those stupidly simple brown robes. He'd grown thinner and more careworn. When his eyes locked with his older brother's, they blazed with a most un-Jedi-like rage. The broken Force bond throbbed in pain again.

"It's been a long time, little brother," Hisashi said, glee leaking into his voice. "My, don't you seem angry? Our old teachers would be ashamed."

Kazuki glared. "Don't you dare talk about the people you murdered." His lightsaber snapped to life in a purple blaze.

Hisashi ignited his red double-headed lightsaber. Despite his relaxed posture, he watched carefully for the first attack.

A cough shook Kazuki's body. His blade wavered. As the coughs kept coming, he nearly fell to his knees, grabbing the door frame to steady himself. Blood dripped down his chin to stain the collar of his robe.

Mustafar had done a number on his little brother's lungs—Hisashi hadn't realized how badly until now. This would be easier than he'd thought.

Kazuki's eyes darted around. Hisashi didn't need the Force to guess he was contemplating escape routes. Softly, the Sith Lord said, "Search your senses, though I know you were never very good at that."

"Shut up, you bast—" The insult cut off as Kazuki leaned against the door coughing. His younger brother's much weaker abilities compared to his Chosen One older brother had always been a sore spot. Nevertheless, even Kazuki could sense the entire army lurking just over the desert horizon. The Jedi's eyes narrowed in resolve.

"Thinking about trying to hold them off so your little apprentice can escape? It won't work. You're quite surrounded." Hisashi's lips curved back into a cold smile. "If the child runs off without you, the Star Destroyer overhead will blast him from the sky."

As he'd hoped, Kazuki's eyes widened with fear—not for himself, but others had always been his weakness. "You—" He coughed up a chunk of bloody tissue onto the sand.

At this rate, Hisashi could simply wait for his brother to fall over unconscious on his own, then drag him back to the Star Destroyer.

Kazuki had probably realized the same thing, because he gripped the door frame and brought his lightsaber up with one shaking hand, readying himself for a last attempt. Hisashi readied his own blade.

"Stop! Don't hurt my uncle!" A green-haired little boy ran out and clutched Kazuki's leg. He couldn't have been more than five years old, with tousled curls and freckles.

"Get back inside, Izuku," Kazuki hissed, but he was too weak to even shake off a child.

The boy stubbornly clung on. Green eyes peered up at Hisashi, and the Sith staggered backward in shock.

Those eyes were exactly like hers.

Hisashi reached out, touching the boy's bright, blazing presence in the Force. Not that he'd needed to. He already knew. He had a son. His son had survived. The entire galaxy tilted on its axis. The Force sang.

Somehow, the first words which emerged from his throat were, "You took my son to Tatooine?"

Kazuki winced at the loud shriek. "It's a perfectly fine planet," he mumbled. From the resignation in his Force signature, he'd clearly realized the jig was up on the son matter.

Hisashi glared. "Name one good thing about this hive of despair and low-level crime."

"It's…uh…sunny."

"I'll give you that, but is the never-ending desert heat and constant sunburns a good thing? There's a reason I vowed to never set foot here again."

"Yet here you are…" Kazuki whispered bitterly. He coughed again.

"A lucky happenstance, since otherwise I wouldn't have known that you stole my son from me!"

"It was his mother's dying wish. Do you want to talk about why Inko didn't want you around her child?"

Fury overtook Hisashi. He growled, "One more word on that topic, and I'm shipping you off the Mustafar alone."

This was a bluff—Kazuki's lungs probably couldn't survive the volcano planet—but it made his brother pale and glance down at the child clinging to his leg, clearly more worried about being separated from him than his own survival. A lever he could use to force his foolish younger brother to come quietly.

Izuku leapt forward, his arms outstretched. "Don't you dare bully my uncle!" His eyes blazed. He looked so much like Hisashi as a child, including that exact same expression from when he'd defended his younger brother from bullies many times. It made the Sith's blackened heart twist.

Snapping off his lightsaber, Hisashi knelt down next to his son. "You don't need to be afraid of me. Your name is Izuku, isn't it? I'm your father. I'm so delighted to meet you. You're such a good child, protecting your uncle like that. Is he as much trouble as ever?"

Izuku sighed in a way much older than his years. "He keeps telling me to keep a low profile, then picking a fight with the local Hutts. We've had to move four times now."

"Oh, dear, that does sound exactly like him."

"Why are you both picking on me?" Kazuki mumbled. "Izuku, you were the one who got into a tousle with the local slavers the last time we had to move."

This sounded very worrying. His idiot brother couldn't be trusted to keep himself alive, much less a small child. "I'm here to look after both of you from now on." Hisashi successfully ignored Kazuki saying something low and sarcastic. "I'll take you somewhere much nicer and safer, with all the toys and holodramas you'd like."

Izuku's green gaze remained wary. "Thanks, Dad."

The boy knew he didn't actually have any choice. Such a smart child.

As the Star Destroyer vanished into hyperspace, Hisashi stroked his son's hair. Izuku lay across his lap, sleeping. The boy had remained polite and coldly distant over dinner. It was only after his stomach had been stuffed with good food and he'd grown sleepy that Hisashi had the opportunity to pull his son into his lap. (The Sith might have nudged the child to fall asleep a bit faster using the Force.) The soft curls felt perfect. His son blazed in the Force like a supernova, a power comfortingly like his own. Hisashi hadn't felt this relaxed in years.

He'd stuffed Kazuki into a bacta tank, both because his lungs clearly needed it and to keep him out of trouble while Hisashi arranged a new residence. The Sith Lord was strongly considering Naboo, a lovely world. He was torn between keeping Izuku's existence a secret and introducing him as Naboo's prince so he could receive the training in leadership to one day become emperor.

Mera had been granted a temporary reprieve since his petty assertion of nonexistent authority had resulted in Hisashi finding his missing family. But at the first private moment, he'd explain to the so-called emperor that he was one more mistake from mysteriously losing his ability to breathe.

Regardless of if Emperor Mera behaved like a good puppet or not, Hisashi would one day hand the galaxy over to his son, the only person who deserved it.

Izuku shifted in his lap. Hisashi leaned over and hummed a lullaby. The Force hummed too, agitated by both of their powerful presences, light and dark clashing together in a crescendo.

OMAKE TIME!

Omake: Hisashi's Belief That He Could Keep His Brother Out of Trouble Was…Optimistic

Hisashi: (Looking at a broken bacta tank.) What happened here?

Unfortunate Stormtrooper: There were exceptional circumstances, we got attacked by space pirates—

Hisashi: I don't actually care to hear your excuses, have a force choke.

#One of the basic rules of Star Wars is that if Anakin and Obi-Wan are in the same place then chaos follows #Adding the Shigaraki brothers in those roles only further stacks the odds #The bad news is that Kazuki got kidnapped by pirates #The good news is that he already escaped #The bad news for Hisashi is that now he has to deal with his brother sneaking back and trying to steal Izuku #Kazuki doesn't have great odds of success but you'd better believe he's going to give his big brother absolute hell and blow up a lot of stuff

#

Omake: All for One Versus Anakin

Hisashi: I hear you Force-choke admirals when they annoy you? Pshaw. I kill emperors.

Anakin: Will you go away?

Hisashi: I'm just trying to offer you some tips on how to be a better Sith.

Anakin: I'm not interested. Haven't you heard I'm redeemed now? I'm not going by Darth Vader any longer.

Hisashi: Step One: your costume. It's decently intimidating, but it looks like it was made from plastic. And what's going with the pointy bits sticking out of the side of your helmet? I'll give you the number of my personal costume designer. She can do better.

Anakin: I said I wasn't interested.

Hisashi: I can't help noticing that at the end of your trilogy, your helmet came off very easily. This is a serious design flaw and very easily fixable.

Anakin: For the love of the Force, go away!

Author's Note:

The first Empress was the unnamed President of the Hero Public Safety Commission. Hisashi installed her as a puppet since a former Jedi with no political position didn't have the credibility to become emperor at that point in time. (He'd planned to make Inko the Empress, but she died like Padmé in canon.) As soon as his puppet empress started defying his orders, Hisashi killed her and replaced her with Mera (another Public Safety Commission underling in canon). He's always been the one running the galaxy behind the scenes.

This story will update every Thursday evening. (I also update A Life Not Lived on Tuesdays and my All for One-First body swap story starting next Sunday.)