Spoilers from included and/or represented works abound. Please read this fiction carefully.
"I am Kyoman Kusanagi."/"草薙京万です." The man introduced himself. "The 10,000th clone of Kyo Kusanagi!"
草薙京万 (くさなぎ きょうまん)
"Having Kyo's DNA, as well as K's, and K9999 and even that nameless one..." Luise figured it out. "You must be the...!"
"The epic experiment heralded by the Rift Goddess, she who have the omniverse in her hands!" Kyoman revealed. "You know the result?"
Kyoman made a very small but extremely flaming fireball despite wearing the ice glove. He threw it towards a pure tungsten monolith. This resulted in not only so much of it instantly melting, but most of it ended up boiling a mere couple of seconds after impact, eventually leading to the monolith being quickly destroyed by insane heat alone.
Kyoman then retracts the flame, leaving only a melty loads of tungsten far away. He catches the flame back, extinguishing it with the ice glove.
Everyone else (but Nahida's sleeping) is shocked at the result.
"I can even fry you just by touching you." Kyoman told Luise. "Luise Meyrink."
"Why are you here?" Luise questioned.
"Simply crashing to Zero." Kyoman revealed. "Oh yeah, and have you tried to escape?"
"Yes, but nothing ever worked." Luise admitted. "I cannot teleport!"
Kyoman left an evil laugh.
"Yes, because we depowered you all!" Kyoman revealed it. "The Rift Goddess specifically handicapped you with some Cube runes, so you can't escape at all!"
"Nein!" Luise is frustrated. "Et tu?"
"Bullshit!" A voice is heard screeching.
"Get over here!" A dual voice as well.
"What!?" Kyoman noticed.
Judeim and the wanderer broke in.
"Behold, the Fang of Darkness!" The wanderer declared.
"Finally, we're saved!" Scaramouche the Balladeer noticed. "But wait... it's me...!?"
"Huh? Is that... me?" Scaramouche the Wanderer noticed it.
Both versions looked at each other in confusion.
"What!?" Both are shocked.
Note: You can pull off and get Scaramouche, in his playable version (the Wanderer), through gacha, in Genshin Impact. This playable version comes after the Sumeru storyline, so if you fights Scaramouche as the Balladeer (Shouki no Kami) using the playable version, Scaramouche the Wanderer, or simply advancing the Sumeru storyline using the latter, then the story would be broken.
Using this knowledge, I deliberately wrote this plot to set up both reaction. This obviously also come across as some spoiler for Sumeru, and I repeatedly warned you about that.
"I'm trying to be... human." Scaramouche the Wanderer told his past self. "A human without heart... might not exactly human..." *sigh*
"Humanly filth... humanly weakness..." Scaramouche the Balladeer responded. "Shouldn't you get rid of it, like me?"
"I don't care." Kyoman refuted. "Why are you breaking in!?"
"We're going to save those hostages." Judeim replied. "Wanderer, you remove the ropes that's tying. I fight this guy."
"So you want to fight me, the one beyond K?" Kyoman questioned.
"Kusanagi, or rather... that clone, I shall-" Judeim declared-
"Hmph. You wanna challenge me?" Kyoman taunted. "Alright, challenge accepted! KOF battle!"
Wasting no time, the two quickly engaged in a 1v1, King of Fighters-type battle, with Kyoman's flame pitted against the Zoan prowess of Judeim. Epic battle ensues, while Scaramouche the Wanderer is untying the ropes for the rest to escape.
"If I don't hurry, this satellite might...!" Scaramouche the Wanderer is untying Luise right now.
The satellite is falling like a meteor, about to hit the Zero amalgamation of Reality Zero and the Last Reality.
"Remaining distance: 300,000 kilometres."
At this point, Scaramouche just successfully untied Luise.
"Thank you... stranger." Luise thanked.
"Can you help me untie the rest?" Scaramouche the Wanderer offered.
Luise agreed, so the Wanderer started untying Nahida, while Luise unties the Fatui Harbingers.
Not long afterwards, Judeim and Kyoman is trading blows and getting knock off one at a time in the process. Having Nahida and Tartaglia untied...
"Remaining distance: 250,000 kilometres."
Nahida and Tartaglia decided to assist, so Luise and the Wanderer got assisted in untying the rest of the Harbingers.
"Approaching 500 kilometres per second."
The fight proved to not be all that decisive, as Judeim and Kyoman continues to handle and withstand each other.
"Remaining distance: 200,000 kilometres."
Scaramouche the Balladeer, Il Dottore, and a couple other Harbingers for freed, so they lend a hand to unties the rest.
Every hits divided and dealt rather evenly by both fighters.
"Remaining distance: 150,000 kilometres."
"Thank you all." Pierro thanked all.
"We can escape soon. Now all we need to do is too find the exit." Scaramouche the Wanderer noted.
"But most of us has been depowered." Luise complained. "Also, that coffin!"
Everyone except fighters fighting looked at La Signora's coffin.
"Yeah, because... she's dead." Columbina responded. "Can we leave her alone?"
"No." Scaramouche the Wanderer refuted. "We have to bring the coffin as well. If it's important to you, then why not?"
"Uh, ok." The Harbingers scantly replied.
"Approaching 600 kilometres per second. Remains distance: 100,000 kilometres."
"It's gonna crash into that dystopia, right?" Scaramouche the Balladeer asked.
"I saw the screens and the controls, and found that it's crashing to 'Zero Hell'." Scaramouche the Wanderer replied.
"Ok, me. So we're going to the-" Scaramouche the Balladeer suggested-
The Balladeer got knocked off by Judeim, having sent the latter flying by Kyoman. This led to both the original rescue being knocked down.
"Impressive. So impressive, I'm scared." Kyoman commented.
"Clone Kusanagi!" Luise noticed.
"Remaining distance: 75,000 kilometres."
Kyoman takes off the ice glove, revealing a very much human-looking hand that's burning and crackling in ember.
"How could you try to rescue them all!?" Kyoman gets angry.
"Judeim... My turn." Luise stood ahead, in front of Kyoman. "Judeim, Meira... I want you to live a normal, happy, human life."
"Luise?" Judeim realized something.
"Don't worry. I'll take this." Luise replied. "I want you to live a normal, happy life as human twins."
"I can still fight!" Judeim refuted.
"Nahida, deactivate the remote power limiter!" Luise commanded.
"I just did. Completely." Nahida revealed to have done it. "This means you're back to your powers!"
Luise floats, much to Kyoman's chargin.
"What the heck!? You got your powers back!?" Kyoman is frustrated.
"Everyone, get out of the-" Luise shouted-
Judeim slapped Luise, and wants to combat together.
"Look, it's dangerous." Judeim told Luise. "He removed the ice glove? His fire gets much stronger."
"Approaching 700 kilometres per second. Remaining distance: 50,000 kilometres."
"Everyone, get out of the satellite asteroiding, now!" Luise shouted.
"But we're in space!" Tartaglia complained. "Space doesn't have oxygen or enough particles, so most of us thusly would die!"
"Beside, the satellite is falling like an asteroid!" Tartaglia continued. "We can't handle such frictional heat coming from it!"
Luise sighed, and Judeim facepalmed. Kyoman just laughs off.
"You still can't escape, lol!" Kyoman mocked everyone else.
"Actually, we can teleport." Luise noted. "But why waste our time refuting each other?"
The KOF-type fight continues, but now Judeim tagged with Luise. This time, Kyoman actually needed his extra flame to catch up with the duo. The fight also gives time for the Harbingers and Nahida to get to the control center.
"Approaching 750 kilometres per second. Remaining distance: 25,000 kilometres."
"It's getting faster..." Scaramouche the Wanderer noted. "Nahida, can you... activate your device?"
Nahida activated the (Nexus) Akasha Terminal, and managed to link it to the control, getting access to literally everything NEST, as well as various things about the Rift Goddess. Nahida uploaded it and the camera showing the fight to the entire alliance, ensuring the information and knowledge gets passed to them, as well as notifying them that the rescue is (mostly) successful.
"Fatui Harbingers all saved!" So the Harbingers celebrated-
"Stop, is it really the end of this?" Scaramouche the Wanderer cut the celebration short.
"I uploaded everything needed." Nahida reported. "Unlinking the device..."
"Approaching 1,000 kilometres per second. Remaining distance: 10,000 kilometres. Entering Earth-like atmosphere."
"We won!" Luise and Judeim teleported to bring everyone out. "Let's get out of here, now!"
Everyone, with Luise's power, teleported out of the satellite, leaving the defeated Kyoman to the death crash.
"Damn it...!" Kyoman lies down, defeated.
So quickly, less than 10 seconds afterwards, the satellite crashed. Specifically, into the same place where the monsters once devoured Ariana Grande. And then all teleported to the place behind.
"Ah..." *pants pants* "We're safe now..." Luise is exhausted.
Luise falls down, with Judeim catching her. The Harbingers looked at the crashed satellite, and thought to themselves: "That Kusanagi clone is dead."
"Akasha, detect anything?" Nahida set up the device.
One Looper is detected.
"Huh? A Looper?" Nahida noticed.
Then she realized that the detected Looper was in the satellite, now crashed down, should've perished. Yet...
"Could that be possible?" Nahida thought about it. "No, that crash would have just killed them, but..."
"What's wrong?" Scaramouche the Wanderer asked.
"I just detected a Looper with Akasha Terminal, and I don't know what else they are..." Nahida replied.
A big geyser of flame erupted inside the satellite, breaking out.
"What? How!?" Nahida is scared.
"Haste!" Tartaglia shot a water arrow into the geyser.
That catches the water, overly boiling it. A figure emerged, having caught that arrow.
"Heh, don't you know it?"
Everyone gasped at the figure.
"Kyoman's here. You really think that satellite crash would end me for real? Think again!"
"That clone of Kusanagi!" Judeim called it out, spotting Kyoman. "How are you still fine!?"
"I die, but a Loop spawn drone integrated has respawn me, and now I'm here, shit yourself!" Kyoman revealed. "Now I'm a certified Looper, are you going to deal with it?"
"Damn you!" Scaramouche the Wanderer reacted.
Kyoman laughed off, and jumped out.
"I wanted you dead, Kusanali!" Kyoman targeted Nahida.
"No... you're insane..." Nahida is horrified.
"You got away with the Archon Massacre." Kyoman revealed about Nahida.
"What!?" The Harbingers are shocked.
"Do you remember 20 days ago?" Kyoman revealed.
Back in day 7, Kyoman was create by the Rift Goddess (back then known as Genjitsu-no-Omnia), using the same cloning process used by NEST. After having passed the trial given by the Rift Goddess, his first task was...
"Kill the Tsaritsa."
So Kyoman fight the Tsaritsa right at the Snezhaya castle in Teyvat, and single-handedly won. He then showed all the Harbingers the corpse of the Cryo Archon all by himself, and outright burned it in front of their eyes, seizing all the Gnosis as well. Couple of days later, all other Archons soon challenged Kyoman due to Tsaritsa's death, and he proceeded to kill them with his flame, leaving only Nahida (Lesser Lord Kusanali) who escaped Teyvat through the rift.
Back to the present, Nahida is absolutely terrified to hear the story.
"No... Tone-Deaf Bard... Rex Lapis... Raiden Shogun... Focalors... they're all gone..." Nahida is horrified. "And you out-burned... Murata... no...!"
"I slaughtered all of them by myself! My flame is just so powerful!" Kyoman laughed. "The Tsaritsa is a bitch. All those Archons are morons. You, Kusanali, is no more than a spoiled brat!"
Nahida sobs, much to the disgust of all else.
"I'm gonna kill you." Kyoman decided. "You're the last Archon. Get ready to part all your people dead!"
Nahida started crying, notifying Luise.
"Oh no... she's crying..." Scaramouche the Wanderer realized.
"How could you...!" Judeim is pissed off.
"No... Why!?" Luise is shocked.
"Die, you spoiled brat!!!" Kyoman charged ahead, approaching Nahida with flame in his hands. He jumped towards her, ready to murder the Lesser Lord on the spot by burning her.
However, a girl in Pandora appeared, and kicked Kyoman before he could realize, sending him far away and down to the ground. Nahida was barely saved, and stopped crying.
"Huh? I'm... saved?" Nahida noticed.
"Nahida!" The voice is that of Hirume, but reverb-echoed.
"Hirume... Amaterasu!" Nahida realized.
Hirume is shown with her clothes and her hair glowing, and her skin is pitch-black with white lines that seems to match her and her status as a Hegemony God. Her eyes glows red.
The Harbingers, the Wanderer and the aliens all shouted and shook over the Pandora influence, knowing the Pandora has come to aid.
"We'll deal with this rogue clone." Hirume then approached Kyoman.
Following Hirume, the rest of Hegemonies are all Pandora influenced, with all the same kind of treatments.
"No..." Kyoman got up. "The... Hegemony Gods!?"
"Why are you believing in the Rift Goddess?" Goddess Marie (full name: Margueritte Breuil) asked. "I could have embraced you like it's all fine, but you..."
"I need nothing to do with your embrace!" Kyoman refuted. "Wait..."
Kyoman realized that the Hegemonies are using the Pandora power.
"No... You Throne gods harnessing the power of that cube!?" Kyoman is shocked.
The Hegemonies reached Kyoman. Magsarion simply stabs him with his sword.
"Urgh!" Kyoman dies afterwards. The drone absorbs his existence, waiting to respawn him.
Magsarion quickly went out to destroy the drive, but...
"Ugh, damnit!" Magsarion is frustrated. "This can't seem to destroy it!"
The drone flew, and quickly respawned Kyoman, who then used his flame to barrage then all. The Hegemonies suffered little more than a slight heating.
Mitra beheads Kyoman. The drone despawn him, and it let Hajun to destroy it. So the latter did: He took the drone to high sky, and used his destructive power against it. It only merely scratched.
"Shit! Bullshit, bullshit, all bullshit!" Hajun threw the drone down. "This drone's not like the ones found in Reality Zero! It's too tough!"
The Harbingers facepalmed (except the dead La Signora in the coffin).
The drone floated stopping and respawned Kyoman.
"Kyoman Kusanagi! You can't get away forever!" Ren Fuji attacked Kyoman and the drone.
The drone really didn't receive any damage of significance, even cosmetically.
The Hegemonies quickly tried to destroy the drone altogether. The Fatui Harbingers, the Wanderer, Nahida and the two Zoans all teleported to safety.