For newcomers who doesnt know what I'm talking about: Here's two posts for context.
Im going to be honest. Im feeling dreading sick for Kaeya rn (pls help 🥹). I opened this app cuz I wanted to giddily share a nothing-post, a theory that you probably had read it before but I haven't thought of it and it was making me too giddily-excited that I wanted to share. Only to see this post.
I couldn't help it but express my dreading feelings here, so pls let me piggyback this post to also share my theory thoughts. But really, Im feeling it really bad rn, the chills, the dread. It has never stopped and it gets worse over time, starting from the beginning, ngl it feels super unlucky to be a Kaeyamain. Anyone here feels similarly if not the same? (And fyi, it's not affecting me in real life scale, I know how to separate irl and fiction so please, just dont; you could say it's another form of ^{entertainment?).}
If you're not up for a theory you can freely skip it and talk about deathflags! Anw, I'll start abt that theory right now with this:

Kaeya: Oh, you can't tell? My family's lived in Mondstadt for generations. [I got bored sitting around at home, and decided to set off on a journey to expand my horizons.]

Hyperborea, Natlantian, Remuria & Khaun-Arya. Dont the word being hyphenated and Arya capitalized are being too specific? Arya reminds me of Mond's ost "Dream Aria". Khaun-Aria?
Credit to u/Sun_ele155 for telling me for that Aria means wind in latin and Khaenriah possibly being a translation of "traitor of wind" (Im sorry for the unsolicited tag so pls feel free to tell me if you dont like that 🙏)
I think you're already getting a clear picture but let me add more "pieces".
The Abyss Order stole a statue of Barbatos and hung it upside down. Doesn't it signifies their hate against this god? Out of all the other statues of 7?
Kaeya was specifically sent to Dawn Winery, with his dad looking back to him with hatred and hope.
These are what I currently have to support this theory (+other Mondstadt ominous signs. Im curious if the Dadaupa battle is related to this). But Im sure I could dig more and Im currently doing that. It's just that this I seriously, seriously, want to share this realization to y'all even if I havent have yet all the pieces:
Haven't you realized it yet? What if Khaenriah were former Mondstadtians! Maybe during in the early ages where Mondstadt is in its lowest point, possibly the slavery period, where their god has immensely disappointed them. Believing that Barbatos has abandoned them. So they branched out, traveled far and formed a new kingdom? In the first Chasm Interlude, a Dain Quest, Dain stated that the ruins there were much more older than their ex-kingdom.^hah So how about this, what if these ex-Mondstatians discovered and successfully studied the civilization's technology of this ruins and migrated underground with it?
Or how about these former Mondstatians migrating with the already formed kingdom underground, fully taking it over?
You know, I wonder how did the Crimson Moon Dynasty end?
(Ofc, ex-Mondstatians overtaking the Crimson Moon Dynasty is still just a possibility; it could had started way before!)
Imagine that, Kaeya is a fully Mondstadtian nobility! (Well, half). It's such a game-changing fascinating thought isnt it?
Let me share this tidbit I think is relevant:

“[...] The Temple of Silence was originally founded by the ruling elite of the day. Traditionally, such organizations are bound by a strict and ancient code of nobility.” (Cyno SQ2 spoilers)

Now I think they want get back to their roots and rule it again, and using it for revenge against Celestia.
You know, I dont know why I never thought and realized of this before, Khaenrians being ex-former-Mondstadtians, despite the obvious "pieces" being right there-. I only remember being confused by Kaeya's line “My family has lived in Mondstadt for generations”. But I guess playing through the new update made me "see" it.
Whoever said or thought that Kaeya was involved in a ceremony, and/or that's how he got his "truth-seekinghidden eye ability", I think we nailed it. A possibility of course. A doubt. Just do remind if we take this SQ as an allegory(feels like most SQs I played are), there highly could be littered with red-herrings or that it's not a total representation (I mean, obviously. Im still leaning onto the "opposites in each cycles" theory but Im still trying to prove that).
———
Separate comments:
If we assume that the cycle "Hyperborea" occured in Snezhnaya (the word relates to extreme north, look it up) and "Natlantian" for Natlan, try to think of civilizations that were both destroyed and its people cursed, representing each of our present nations. Outside of the unified civilizations ofc (with Trifecta symbols), post-Primordial One/Celestia rule. ALSO NOTE THAT WE ARE STILL HALF-WAY OF THE KHAUN-ARYA CYCLE (sorry for the caps, I just lately discovered this one). What happened in Khaenriah was only the beginning
Do you know, during the Remuria ruling era, there were two "nations" that were involved to something, and no, Im not talking abt Fontaine for the other one. Cassiodor's former tribe (it's a group of people, it counts right?), was destroyed and its people ‘enslaved’ by Remuria (hmm, doesnt it overlap with ex-mond theory too?). Him defecting to Remuria and being, *ahem*, close friends with Boethius being the reason of escaping that fate. In the end, Remuria still had gotten itself destroyed. Tbh I still need to look deeply more onto this but this is what I currently have.
Okay now, to this final part is an afterthought of the post and I don't have the explanation for it(meaning proof). It was an instantaneous thought. And I quickly forgot what urged me that thought, the reasons why. Sorry, but I have(and want) to write this here for the record: I couldn't help but feel that, in the same way we experience and progress through the storyline in the game, this samsara cycles shenanigans, civilizations being destroyed, first started in Mondstadt. And we are now back in a full circle.

Uranus - Secret Underwater Lab, formerly of Tyl Regor
It was a strange homecoming for the Grineer tubeman Kahl-175 after they left Cetus and departed Earth. The two of them had barely managed to exit the atmosphere when the RailJack expertly maneuvered in the zero-G environment to lock umbilicus and essentially tow the Skaut along, Cephalon Cy’s voice broadcasting over the comm-link.
“Locked and loaded. Uranus course plotted. Reliquary Drive online.”
“Belay. Utilize the solar rail network instead.” Wukong said quickly.
“Affirmative. Update: riding the rails will be two hours with current traffic volume.”
Wukong waved a taloned hand dismissively, “Acknowledged. Let’s get under-way.”
Kahl-175’s deep-set features were furrowed and perplexed, his voice rumbling out from under his camo helmet. “This longer. You said Blue-Girl saved with plan.”
“That’s correct, Kahl. But I don’t like being under anyone’s thumb, so to speak, thus we’re using the solar rails instead.” the space simian said over his shoulder as his tail wrapped around the ceremonial urn and walked with it towards the umbilicus. “I’ll be aboard the RailJack, stay here and monitor the link between the ships as they’re non-standard connections.”
Kahl-175 made a meaty fist in his ballistics glove with his thumb extended, gazing at it curiously, “Under whose thumb?” he mused aloud but when he looked up, he was alone.
The solar rail network was a series of space stations at nearly every major planet which provided relatively safe and efficient travel to and from each other for vessels that weren’t inherently capable of the velocity required for interplanetary travel. For a modest transit fee, and another less-than-modest bribe, you could ride the light-rails inspection free with the other jockeys from one end of the Origin system to the other in less than a day. As previously stated, it was relatively safe but there are always reports from time to time of space pirates and the like, interrupting the flow of orbital and extra-orbital traffic with their brutal raids and swift pilferings. Such is life in the Origin system.
Thankfully that was not the case when the Railjack reached Mars’ solar rail junction with the Skaut in tow, which appeared to be light with transiting craft. The singular but sizable fee was paid, as it was not standard procedure to have two separate craft buddy-jump together as it was likely an attempt to avoid paying a second transit fee, but Cy cited to the junction cephalon an obscure and entirely likely out-of-date policy about military vessels that was entirely too long and too complicated for it to argue with.
Once their tethered ships were aligned and they were given a healthy push to the next rail transit at Ceres, Cy gave a short laugh with Wukong standing at the Navigation display.
“Ignorant specter. Solar rail junctions have a one minute window to launch. Cephalon interactions, after the fee paid, are manually overridden after sixty seconds. I call it the Ordis Clause. Ha ha.”
“Clever. Ceres to Jupiter, to Saturn, to Uranus then?”
“Correct.”
“Highest degree of probability of attack from undesirables?” the space simian inquired, tilting his head back and looking up at the ceiling from their mapped path after noting the region that Cy marked while he asked.
“Ceres to Jupiter. Sixty-four point six percent chance of incident this solar cycle.”
“Noted. Considering we’re towing another ship, we’re two for the price of one. They’ll probably make a run at us. Link comms to the Skaut. Kahl-175?”
After a brief pause, “Kahl here. Ship still secure.”
“There is a chance we’ll be attacked during the next transit jump at Ceres, so immediately after the push, I’m going to seal the two ships and detach the umbilicus. If we do get attacked, we won’t be connected and can maneuver independently. Are you able to pilot that vehicle in a fight?”
“Kahl came out tube able.” he rumbled quite proudly. “Kahl need someone to shoot tail gun.”
“I’ll handle that. Thank you, Kahl.” and as he spoke, another Wukong came down out of the dorsal turret and headed over to the Skaut while they were still connected.
“Welcome.”
The remaining transit to Ceres was uneventful with Wukong leaving the piloting and forward artillery to Cephalon Cy after he took position in the dorsal turret, which would allow him three hundred and sixty degrees of upper hemisphere coverage. And yet another Wukong was waiting patiently towards the rear of the vessel near what had been deemed the Slingshot. Similar to a coil- or rail-gun, it magnetically propelled whatever object inside it to incredible velocities, and depending on the object, the ability to gain forcible entry to large space-faring ships. This Wukong had also taken the time to don an Itzal-model Archwing chassis and weapon harness allowing him to maneuver in zero-g along with providing more-agile fire support. He wouldn’t be as well protected outside the RailJack’s impressively dense hull but the Itzal was specifically designed for stealth engagement with sensor bafflers and visual distortion, which cumulatively would render him effectively invisible against the black backdrop of stellar space.
Kahl-175 was familiar with the concept of vehicular space combat but he was a foot-slogger by design, so he had spent the intervening time memorizing the various switches and modes he would have to operate in a combat scenario.
“Autocannons online? Check. Engine boost charged? Check. Shields? Hull integrity? Check.”
The Ceres rail junction inquired electronically, re-confirmed their transit and payment, then pushed them along without any audio interaction. Once the tethered craft were outside of the junction’s sensor range, Wukong and Kahl went ahead and locked down their respective vessels, sealing off and retracting the umbilicus to coast together towards the scattered remains of a former asteroid belt that drifted between Ceres and Jupiter. The iron and rubido composition of asteroids had a scattering effect on ship’s sensors, which made it an effective area for ambushes.
Radio silence.
Space pirates, as a whole, aren’t particularly intelligent except for their captains and maybe their enterprising first mates, but even they were more cunning than brilliant. Smarter raiders would have chosen to attack commercial vessels, but perhaps the allure of capturing military vessels and adding them to their armada was too good to ignore.
Once the RailJack and Skaut were fully within the scan-disruptive effects of the surrounding debris, the pirates struck, swarming out from their hiding holes, mostly naturally occurring crevasses, and approached the pair from several attack vectors, radio comms exploding with unshielded demands to surrender and prepare to be boarded.
Cy broadcast in a flattened tone, “Raiders, your short lives are about to become crap dipped in misery. Crew, if you would.”
The Grineer military-grade autocannons on the nose and tail cut loose at that moment as well the Railjack’s Vekti model Laith shrapnel blasters unloaded their barrages from the forward artillery points and dorsal turret while simultaneously executing a split-Y maneuver to distance their vessels away and broaden the enemy’s field of fire from being concentrated on them together.
Wukong stepped onto the chambering sconce, powering up the Archwing chassis, which dutifully fed him into the Slingshot’s barrel.
“Cy, if you’ve got eyes on the lead vessel.” the celestial chimp prompted.
“Prepare to ring their doorbell.”
The RailJack performed a short engine boost, abruptly thrusting forward to gain some distance from the pursuing raiders, quickly spun port-side before fully stopping to briefly divert engine power to the Slingshot, and with a crackle of discharged electricity briefly along the skin of the ship, Wukong was fired out towards a large Corpus crewship. Cy continued his turning maneuver and plowed forward back into the teeth of the now-incoming pirates, guns blazing.
Wukong smashed explosively through the reinforced hull of the crewship, a brilliant shower of sparks flying as he ruptured conduits and circuitry in the skin of the vessel, pulling the emergency release valve on the Archwing unit right before impact, leaving it in standby mode outside the ship with its stealth systems engaged.
Klaxons blared deafeningly with flashing lights at the explosive decompression in the area of the ship he erupted into, which appeared to be an upper bay. The space simian reached out and found the comforting weight of his staff in his hand, raptor-beak blades no longer hinged down but outward like sickles ready to thresh wheat.
He stalked forward at a quickened pace, eyes fixed forward to the corridor outside the bay. Motion ahead.
Uranus - Secret Underwater Lab, formerly of Tyl Regor
The Grineer cloning facility on Uranus, once considered hidden beneath its vast ocean, had been operated under the sole discretion of the renowned biologic experimenter Tyl Regor seeking a reliable means to either treat or ultimately cure the clone rot which plagued the Grineer forces. It provided all the necessary infrastructure that Wukong required for this part of his plan and as it was relatively difficult to reach without detection, they would hopefully remain undisturbed for the duration.
The Skaut craft slowly surfaced into the dock section of the facility, grapples launched, reeled-in, and locked. Wukong regarded their impressive haul of raw Tower material while speaking into the comm to Cy as the exit ramp descended to the loading dock.
“Return to Earth and get those repairs taken care of as soon as possible. You’re free to resume Reliquary Drive use at this time.”
“Inquiry: why is it now permissible to use the-” Cy began.
“That’ll be all. Over and out.” Wukong interjected before muting the comm and turning to regard Kahl-175 with his impassive countenance, the high-pitched screams of the dying space pirates still ringing in his ears. “Do you know this place, Kahl?”
The Grineer tubeman had indeed been looking about fervently, eye, both natural and cybernetic, darting around like he was attempting to spot incoming sniper fire. “Yes. Born here.”
“Is that going to be a problem?”
“No problem. Familiar ground.” he replied with a small shake of his head.
“Excellent. Then I shouldn’t have to show you around.” Wukong said with a curt toss of his own head towards the chamber exit. “Let’s get this loaded onto the lift to sub-level 13-40 with the large centrifurnace. We’ve got a significant amount of work ahead of us.”
Wukong firmly closed the lid atop the thermal centrifuge, spinning the wheel tight after flipping the latches until the seal indicator flashed green. The space simian stepped off the top of the two story tall machine and drifted downward to the floor next to Kahl-175.
“Big tubeman.” the former Grineer rumbled.
“Not exactly.” Wukong replied laconically while giving a thorough final check over the machine as he walked around it. It was essentially a large, transparent sphere, now full to the brim with the Unum’s Tower flesh, that would use a low, simmering heat and centrifugal force to separate the varying densities of organic material, which would either be siphoned off to the seven surrounding smaller, vertical tubes for storage or reintroduced to the suspension for further rendering.
“And by that, I mean this machine will be doing the exact opposite of growing flesh. It will break down the material to its most basic parts, or specifically to the one part I require, which is called ‘amino’. The basic building blocks of life, Kahl.” the mercurial monkey explained as he approached the control panel, striking several keys in quick succession. A slow but insistent hum started beneath their feet, drawing Kahl’s attention downward. “There. I’ve initiated the process by activating the heater cores beneath the centrifuge. It will take some time to bring the mass up to proper temperature, so you have time at your leisure to either eat, rest, whatever it is that you do when you aren’t involving yourself in guerilla tactics with the Narmer.”
Kahl-175 opened his mouth to reply as he brought his attention up from the vibrating floor only to find himself alone with his thoughts in the very place he was created.
A full day passed before Wukong would find Kahl-175 in the centrifuge chamber, which had significantly grown in temperature and noise in the interim. The tubeman was watching the machine with an intense expression, almost a rapt fascination that Wukong wasn’t sure the former Grineer had noticed his approach.
He simply said, “Wukong.” to which the space simian inclined his head in acknowledgement before taking a lap around the machine, noticing that the lateral tubes were indeed beginning to collect liquid. Wukong gestured to the tubeman over to the control panel as he read over the various gauges and indicators on the large holographic display. The vast majority of this field of science wasn’t within Wukong’s realm of esoteric knowledge, but thankfully the computer knew what to do as it had been originally designed to perform a very similar function to Tyl Regor’s tubemen that failed his various experiments.
“Kahl, this reading here is the important one.” Wukong said, pointing a glinting talon at the display before gesturing to one vertical tube over his shoulder nearest the control panel. “That tube is collecting the first render of amino. It’s unfortunately also the material that takes the longest to process, however as we are now operating at full temperature and speed, it’ll go quicker moving forward. Once that tube is full, which means the gauge will be read one hundred percent, we’ll make our trip to Deimos and talk to Kaelli.”
Kahl went to speak, just opening his mouth before Wukong interjected with a raised hand, “Yes, I know you’re eager to move forward but I require a bit more patience and there is still work to be done here, work you and I can accomplish together which should take your mind off things. How does that sound?”
“How long?” Kahl inquired finally.
“Three days.”
“When can we start?”
Kahl-175 and Wukong worked tirelessly over the next few days, disconnecting equipment from one of the various entrances to the facility and then reinstalling around the amino collection tubes as to prevent any type of viral or bacterial contamination, breaking only for Kahl-175 to get food and grab maybe a few hours of sleep before getting back to it. The amino, in its purest state, was extremely susceptible to biological influence and it was of the utmost importance to keep it free from contagion. The devices were powerful entropic field generators that any organic substance would be disintegrated passing through them and their calibrations were very delicate and their alignment with respect to each other very specific as not to inadvertently destroy the sample that they were meant to protect. After the final series of calibrations were complete, Wukong stepped away from the console and turned to Kahl-175.
“It’s time. Let’s go.”