Disclaimer: I don't own Code Geass or Steven Universe.
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2018 atb (Ascension Throne Britannia)
Pendragon, Holy Britannian Empire
The Imperial City of Pendragon, the capital of the empire was conquered by an alien forces from space called The Gems. Nobody knows how that happened, there was no warning, the Britannian Armed Forces and Police Force tried to stopped them, but their weapons not even their onw Knightmares are no matched against an advance alien technology. The Gem Armada floating above the Imperical Capital while the Gems patroling and the people staying inside their homes. The commander and leader of the invading force, and a member of Diamond Authority named Purple Diamond as she and her Pearl and Jasper now walks inside halls of the Imperial Throne Room where the Britannian Imperial Family members and nobility are now being held aka hostages guarded by the Gems and a human cult worshippers of Purple Diamond called Purple Cobras wearing armors (Think Kamen Rider Ouja from Kamen Rider Ryuuki) as they stand afraid seeing their conquering alien overlady walking in triumph.
"Report, Pearl. Speak." Purple Diamond asks her Pearl calmly.
"We have sealed the gates and secured to the Imperial City of Pendragon, my diamond. The Imperial Palace is secure and we are closing to take the entire continent as we speak."
"Excellent, Pearl. And what about Schneizel, Jasper?"
"He and his followers are nowhere to be seen in the capital, my diamond, the remaining members of Knights of Round continues to lead the resistance against us. I assure you, we will have him for sure." Jasper said to her diamond.
"I want him kneeling at my feet." She now stops in front of the throne.
"Pendragon is now yours, my diamond." Pearl and Jasper said in unison.
"No!" Purple Diamond turned around and face them as she corrects them. "It is ours, my dear pearl and jasper, we did it together, together." She put her hands on Pearl's and Jasper's shoulders which made them smile.
"The Britannian people will never bow before you." A familiar voice said in defiance.
"Oh. Now someone is speaking to me." She now sits the Imperial Throne of Britannia as she looks at the side of familiar man. "Ah, yes, Charles zi Britannia, the 98th Emperor of the Holy Britannian Empire, my lovely and annoying prisoner. You're now a loser. I've won, I've really won. The darkness is rising to embrace you. The dark can embrace the light, but never eclipse it."
"You have not won yet, Luciana." Charles said in defiance as he narrows his eyes to her. Purple Diamond, who was once Luciana, narrows her purple diamond-shaped eyes in anger as she stands from the throne and angrily shouts to her former father.
"That name is DEAD, Charles! You send me and Nunnally in exile in Japan for being 'political tools' and left us dead during the invasion, and I was once Zero that led my war against you but I've been betrayed by the hands of the traitorous Black Knights the organization I've build with blood and sweat are now led by that bastard Ohgi Kaname and that manipulative prince Schneizel! For I, Purple Diamond, have been reawaken to conquer this world, I've become more stronger and more powerful than other humans on this planet." She clenched her fists in anger. "I'll have their crushed bodies laying to my feet! Earth will become a new dominion to the Diamond Authority!" She stomped her right foot to the ground floor with a rumble on the throne room.
"The world is full of lies, Luciana." Charles said once again in defiance as he narrows his eyes to her.
"Really now, you're still have your pride, old man? How sensitive and stubborn you are, but can you feel this?" She said in deadpanned and she smiled sadistically as she snapped her fingers then the cage within Charles began to electrify him with pain. The members of Imperial Family and Imperial nobility are frigthened as they were forced to watched emperor's sreaming while his loyal Knight of One Bismarck Waldstein who was now tied in chains, his left Geass eye was removed, watched helpless that his emperor keeps screaming in agony while Pearl just smile a little and Jasper made a big smile in satisfaction for the old emperor disrespect her diamond and continuing electrify in pain then it stopped as Charles dropped unconscious.
"Hmph, stupid old fool, Peridot, activate the holosphere." Purple Diamond said to Peridot. "Yes, my diamond." As she activate the device then Purple Diamond started to making statement to the world for everybody to see her image. "Hear me people of world and all other conquered nations by Britannia, the war is over. My forces are victorious. Emperor Charles and Britannia is my prisoner and their lives is now mine. Let this be my first decree: Those who do not pledge themselves to me shall be destroyed. The Imperial Age of Britannia is over, the Age of the Gems has began! Ohohohohohohoho~!"
"All Hail Purple Diamond!" Pearl, Jasper and Peridot chanted loudly as they made diamond salute followed by the Gems and Purple Cobras.
"ALL HAIL PURPLE DIAMOND! ALL HAIL PURPLE DIAMOND! ALL HAIL PURPLE DIAMOND! ALL HAIL PURPLE DIAMOND! ALL HAIL PURPLE DIAMOND! ALL HAIL PURPLE DIAMOND! ALL HAIL PURPLE DIAMOND!"
Beside the room where two women standing: Rakshata Chawla and CC. Rakshata smiled of her diamond's achivement while CC just holding her stuff doll Cheese-kun and just keep looking at Purple Diamond/Luluko.
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Black Knight's flagship Ikaruga
Inside the bridge, where members of the Black Knights watching of Purple Diamond's broadcast. Some of the members were satisfy that Britannia was defeat, some were frightened of the new power, and some didn't care. Ohgi Kaname, the current leader of the Black Knights, one of the conspirators dealing with Prince Shneizel and betraying Zero in exchange for Japan, is now afraid of Purple Diamond while other leaders just watching the screen.
"What now, o fearless leader?" Tamaki Suichiro mockingly asks Ohgi as he's one of the conspirators that betrayed their former leader.
"I really don't know."
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Somewhere in Cambodia
On the safe house, where Prince Schneizel and his group were now hiding from Purple Diamond's grasp as they watched her broadcast. Suzaku Kururugi, the Traitor of Japan, current member of Knights of Round, the One betray Luciana to Prince Scheizel, and the One unleashed FLEIJA on Tokyo Settlement that kills thousands of people, widen his eyes that his former childhood friend and now become an enemy alien invader of the world.
'What have I done.' He mentally said as he low his head in shame that the Luluko he knows is gone and being replaced by the Gem Diamond.
Princess Cornelia narrow her eyes in anger that her beloved homeland was overruned and occupied by Gem invaders while her father and siblings are now hostages of her former half-sibling Luluko now alien invader Pruple Diamond.
"So what are we gonna do, Schneizel?" Cornelia asks him.
"To be honest, Cornelia, I really don't know."
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Gem Homeworld
Three matriarchs of the Diamond Authority: Blue Diamond, Yellow Diamond and White Diamond sitting on their respective thrones as they watching the screen of their fellow diamond stood triumph over Britannia.
"She've done a remarkable job for conquering that pathetic nation called the Holy Britannian Empire. Wouldn't you agree, White, Blue?" Yellow Diamond said as she smirk in satifaction of her fellow diamond.
"Yes, that human Charles has pride and stubborness in him which I didn't understand why he keeps saying 'The world is full of lies'?" Blue Diamond respond in curiosity.
"Oh, he's just talking about the Ragnarok Connection that immortal human female CC told us that he intended to used the Sword of Akasha and Ragnarok Connection to kill God then renew their world which I find that hilarious, but Purple will handle those insignificant remnants of the so-called Geass Order, Blue." White Diamond said as she wave her hand.
"And what about the despicable Black Knights?" Yellow Diamond sneer in annoyance as she her fingers drum on the arm rest and saying that accursed name of the organization that backstabbed Purple Diamond as Zero.
"That too including Schneizel as well, Yellow, she'll crushed them without mercy." White respond back to Yellow as she loathe the organization.
"Indeed. That troublesome group and that deceiver irritates me the most and they must be destroyed no matter the cost!" Blue said it as she clench her fist in anger which Yellow and White nodded their heads in agreement.
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Stadtfeld Manor, Area 11/Japan
Inside the room was Kallen Kouzuki, Britannian name Kallen Stadtfeld, former Captain of the Zero Squad, former bodyguard of Zero, Ace Pilot of Gurren, and now she's sitting on her bed emotionless while she's watching Purple Diamond's broadcast to the world as she reach her hand on the screen touching Purple Diamond's/Luciana's face image then said one word.
"Luciana."
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A/N: If some of you wanted to continue this story, you have my permission to PM me.