#khera

Short version: PK is an arrogant fool and Radiance is mad in multiple ways. Elk (VS700 prototype) and Other (VS600 prototype) were designed to complement each other, part of one of the "vessel" series. Elk killed Other and became deviant, CyberNest threw them out but Other got back for repairs with Khera, but Elk thought they were being destroyed and panicked, leading to Other activating Wiki moments before they and Khera slipped back into oblivion. Wiki (Project ACV) is an AI clone of Monomon uploaded to Elk, they get their secondary body frame later.

Long version:

The Wyrm and The Radiance grew up together, both geniuses in AI and software development. CyberNest was going to be shared between them - or so Radiance thought. When they company was Barely starting out, Wyrm backstabbed Radiance and took all assets for himself. Radiance went mad, eventually converting herself into a superintelligent AI, killing her physical body, and letting herself loose on the internet to watch, to learn.

Grimm was Radiance's sibling, vanished around the same time Radiance did. He is that mysterious-sketchy-but-surprisingly helpful guy that helps out rogue androids for trades and favors. He has a neural implant, linking himself to his own superintelligent AI - the Nightmare Heart, as he calls it. Nightmare is able to control Grimm's body, and sometimes they switch off.

Radiance starts trying to assert control over Wyrm's androids - this causes corruption in memory and software. It can be spread from machine-to-machine interfacing, but what spreads is more like a backdoor for the Radiance - it makes it easier for her to influence the machine and cause what is called "the Infection." In a way, it causes deviation and then takes advantage of the instability.

Wyrm, who now goes by Pale King, realizes that this must be Radiance's doing. He eventually finds out about her state as an AI, and starts developing technology that can resist her, and then software that would have the ability to quarantine and isolate her - possibly entangling the data, corrupting both her and whichever android that got "lucky" enough to be the one to face her. He grows desperate as the Infection sweeps across Hallownest, enlisting the help of Monomon, Lurien, and Herrah. PK convinces them to undergo AI conversion to turn them into sentinel programs, a trio that, in conjunction with a vessel android's AI, should be able to contain the Radiance. Of course, the public doesn't know about this - PK pretty much rules the city and no one thinks to question him. He is untouchable by the law.

The HK series is made to be completely stable - they cannot think, they cannot speak. HK200, "Hollow", is deemed to have the most stable software, and is tasked with finding and neutralizing the Radiance.

Wiki, or Project ACV (Archival Clone Verus) is the AI clone of Monomon - the sentinel program conversion is not the same as the infinitely learning AI development of Wiki. They are designed to be able to absorb an infinite amount of data (and be able to hack into anything to acquire it). Their "body" is composed of nanomachines in thirium (void?? What do you call it in this AU) that communicate with each other and can replicate infinitely, though they need a primary memory storage unit. Immediately upon activation, they connect to the internet, to the confidential databases of CyberNest, and learn everything in an instant. Monomon shuts them off and tries to delete their memory but was unable to, only succeeding in building some firewalls - effective, but all the information is still there. Despite everything, she doesn't want to delete/destroy ACV, and keeps them stored in the assembly/disassembly room, leaving a possible backdoor for reactivation. And then, Monomon undergoes the conversion and disappears from society.

Elk and Other have linked programs designed to oppose, complement, and improve each other. They were deployed a few times, tested and upgraded more and more. For a final test, Elk had to terminate Other, causing Elk's deviancy. Other's data was corrupted, but they uploaded themself to Elk through their link, undetected. Elk was thrown into the junkyard with Other's remains - Elk's stress peaked and they more or less crashed, causing an incident that kills Khera, and Other found themself in control. They harvest parts from their own remains to replace Elk's damaged parts. They find Khera's body, and discover an ability they never knew they had: they injected some self-replicating nanomachines into her body, temporarily reviving her. After some hasty repairs, they make Khera sneak them into CyberNest to fix Elk in both software and hardware. (Other thinks they're corrupted beyond saving.) Khera agrees, taking Elk/Other to the assembly/disassembly/repair room. Khera worked on the software at the same time as the hardware, but Elk regained consciousness and panicked - they had no memory of the junkyard and thought they were being destroyed. Given that they had to be taken apart a bit for repairs, it did certainly seem that way.

Other hacks into the mainframe as a last act, looking for something that could help, and finds Wiki and activates them. Other and Khera both go under, then. Wiki emerges from the ceiling and calms Elk down, taking over the repair and assembly process and assisting Elk. Wiki ends up uploading their "core self" to Elk, and replaces Elk's thirium/void with their nano-thirium/void.

They try to stay away from the goings-on of PK and CyberNest for a while, laying low and investigating whatever they please - but they come in contact with the Radiance and all their systems shut down for a while as they quarantine and stabilize their software. With some undetected assistance from Other, they eventually wake up with corrupted memory (gradually recovered). They start looking into the Radiance, uncovering history, betrayal, how terrible PK really is.

A few possibilities, which branch infinitely, of course:

- Elk and Wiki and others, probably, help Radiance recover her sanity and she leads a movement to overthrow PK. As it turns out, she can very easily cause deviancy, without the negative effects of the Infection. Radiance could succeed, securing rights for androids, or she could fail, becoming sealed away. Resistance could fall or continue, still. Radiance could be freed, the Dreamers could be given androids bodies, PK could either die, go to jail, or vanish. Elk/Wiki then continue as part of the staff of the new CyberNest R&D, developing AI, nanotechnology, and android-support tech.

- Android deviant movement is led by Ghost. Hornet and Quirrel support, HK may or may not come around. Radiance may be contained or quelled.

- Deviants continue to live underground, getting help from Grimm. Elk and Wiki offer their aid to any deviants they find, helping them escape Hallownest.

Project ACV (Archival Clone Verus), "Wiki": Originally intended to be an AI clone of Monomon with extremely powerful computing capacity and information-gathering abilities, their self-evolving AI grew quickly beyond what their creator expected and they were shut down until they were inadvertently awakened, after which they fled with Elk. Their body is composed of void-thirium containing nanomachines, every nanite communicating with a core processor. Their original processor was stationary, but they uploaded themself to Elk, who now acts as their core processor. The nanites can replicate endlessly with sufficient materials, and each improves Wiki's processing power. As time goes on, their analytical abilities improve until they are capable of constructing the past, future, and every possibility.

Verus... “true” in an ancient language. In creating you, I wished to continue my search for knowledge, for truth. And yet... I don’t think I quite understood what I was making. You have progressed far beyond any of my expectations, beyond me, and I... am afraid.

VS Series: An experimental line of androids developed to apprehend deviants, developed before the Infection became a significant issue. Only one of each model is active at a time. They possess powerful analytical abilities and are authorized to wield nails and firearms. They have the hardware for vocalization, but typically do not have the software for it installed unless necessary. After the failure of VS600 and VS700, any further development was abandoned, with significant efforts dedicated to the HK series instead.

VS600, "Other": A lightweight model with specializations in stealth and assassination. Its program was developed in tandem with VS700, the two models intended to complement each other for maximum efficiency. It also has efficient repair functions for itself and other androids, and runs on experimental nanomachine-laced thirium. This was decided to be too much of an unknown, and, while still active in VS600, was not implemented in VS700. VS600 was discovered to have deviated and was destroyed by VS700.

VS700, "Elk": A model developed when the Infection was beginning to become a serious issue - its processor was therefore one of the first made to oppose it, in being able to contain infinitely replicating data and multiple AIs if necessary. Besides that, it is equipped with advanced combat protocols with both nails and firearms, as well as the necessary analytical and negotiation software to deal with deviants directly. It deviated after dispatching VS600 and was disposed of, marking the end of CyberNest's development on the VS series. 

VS800, "Heart": A model developed by ACV and the deviant VS700 following the destruction of Heart's previous body, a significantly older HR300 model. The design was based on VS600, VS700 and has the processing power of an advanced model, but was developed with the purpose of installing an existing deviant AI and as such does not have many protocols on its own.