Ahn Kereu (pl. Ahn Kereuha, /Ah-en Keh-reh-u(wah)/)

M. Menticeres Abscondopotestor
Also called ‘False Eye’, ‘Brainworm’, ‘Corpsenaut’
Public sentientologic record
Property of the Royal Atheneum of Hövnís, Eörpe

Contains parasitism, body horror.
Status: Near Threatened Designation: Sapient Aggression: Medium Origin: Extraplanar Habitat: Civilized Morph: Bitroph
The Ahn Kereuha is a sapient, koinobiont parasitoid belonging to the dissimulex order of the mersanida sphere of life. They are widely feared and still unwelcome — even openly persecuted — in most regions outside of the Llucav Technocracy.  

Etymology and Definition

The first recorded name used to describe the species was the lusoyan’s term for them: ‘cahnur rtage’ (nonlit. translation ‘false eye/mirror’). The name arose from a belief that ahn kereuha infection could be detected by checking the reflectivity and luminosity of the eyes. The same belief is what gave the rtagevopicoti it’s name.   It wasn’t until after they fell under protection of the Llucav Technocracy that their own name for their species, ahn kereuh, was made known. In the wider region of the galaxy however, their own name has remained fairly unknown and they’re still more often referred to by derogatory terms such as ‘brainworms’ and ‘cropsi jamaata’ (Cufosa, nonlit. translation ‘corpsenauts’).   Within the Llucav Technocracy, it’s regarded polite to refer to the ahn kereuh itself as the ‘pilot’ and its host body as the ‘keurunic husk’. Outside of scientific or educational context, calling an ahn kereuh a ‘parasite’ is considered just as insulting as calling them by other derogatory terms.  

History

They were first recognized for what they were just prior to the great Ascendancy-Revered Cheusal War that lead to the fall of the latter and the near-extinction of the ahn kereuha.   The ahn kereuha, using the already conquered cheusali as breeding stock for vehicles, had exploited their alliance status to lead way for a second silent conquest — systematically infecting and replacing lusoyan individuals.

The Modern Ahn Kereuh

According to statements from official spokespeople of the Llucav Technocracy, the surviving ahn kereuh population are today restricted to using vat-grown keurunic husks supplied by the technocracy’s state bioengineering facilities.   Despite these assurances, few other galactic states are willing to allow known individuals of the species past their borders.
 

Habitat & Population

Overall numbers remain low even within the Llucav Technocracy, where they mix with the regular llucevian population. Individuals are enforced by law to use the easily recognizable husks provided by the state, may not hold high state positions or occupy larger regions of land, and are strongly encouraged to contribute to the state’s medical science and industry. Beyond these restrictions, they seemingly have the same rights and obligations as other citizens.  

Geographic Origin

The ahn kereuha are thought to be the mersanida that’s existed the longest in Rosepetal. They’re theorized to originally have come to our galaxy through the gateways used by the long-extinct cheusali civilizations for darkverse traversal.   During the fall of Revered Cheusal the ahn kereuha lost near all of their history and no longer have any collective recollection of where they could have originated from beyond the darkverse.

Galactic Distribution

Ahn kereuha are primarily restricted to living within the Llucav Technocracy due to current circumstances.   Individuals found in other galactic states are near always there unlawfully, hiding within a society using husks stolen from native species.
 

Biology

 

Medicine

The strong coagulant and analgesic properties of ahn kereuh larva’s saliva makes them invaluable for medical science and pharmacology.   Within the Llucav Technocracy reproducing ahn kereuh, who choose to have their egg artificially incubated, are encouraged to consent to have the larva milked for saliva immediately upon hatching. In these cases, certified medical personnel will collect circa 100ml of saliva just before the larva is inserted into their keurunic husk. While this leads to a significantly diminished potential harvest, it’s considered the most ethically acceptable method of milking larva. Several synthetic versions of the enzymes have been created in the years since, but these have so far been less potent than the naturally produced ones.   The Ascendancy used specimens captured during the war with Revered Cheusal to create legally sanctioned farms for breeding ahn kereuh larva to milk the saliva from. Something that they refused to admit to, due to — despite the species status — being considered highly questionable ethically in the wider galaxy. It wasn’t revealed and confirmed until outside investigative sources began to compare their medical preparations with those distributed by the pharmacological industry of the Llucav Technocracy.  

Genetics

 

Reproduction

Ahn kereuha is a gynogenetic species that can produce a single haploid egg roughly once every decade, although most won’t reproduce more than once or twice in their lifetime for the purpose of raising a larva into adulthood. The egg can either be deposited directly into the intended host’s brain cavity for natural incubation, or be artificially incubated and inserted shortly after hatching. In modern day the latter is the most common, as its considered safer and also lowers the incubation time.  

Growth Rate & Stages

Ahn kereuha have a bitroph metamorphality, meaning they need to undergo metamorphosis to move between their two growth stages. They begin as eggs that hatch into the first larval stage, and then undergo metamorphosis to reach the final adult stage.  

Egg

It will take roughly a month for an egg to hatch into a larva if inserted directly into a host and allowed to develop naturally.   Using an artificial incubator cuts this time down by roughly half.

Metamorphosis

Once there’s nothing left for the larva to eat, it triggers it’s plenumeiosis to undergo a rapid metamorphosis into it’s adult stage. The remaining brain matter is merged into the larva over the course of just a few hours.   The plenumeiosis causes the lower body to grow into the foramen magnum and cervical vertebra’s central canals, and couples it to the body’s different organ systems.

Larval Stage

After hatching the larva will settle close to the cerebellum, usually by the flocculonodular lobe, and begin to feed off it. Special enzymes in their saliva act as an effective coagulant and analgesic, preventing the brain from hemorrhaging and the host from dying of pain-induced shock.   The larva will methodically consume all parts of the brain that don’t steer any critical functions needed for its host’s survival. This takes between 21-32 days, and in tandem it’ll grow rapidly to fill the space left behind. The mental capacity of the host is claimed to have some influence of on the development of the larva, and considered the primary reason why the species favor sapient hosts above all else.

Adult Stage

Upon completing metamorphosis the specimen has developed into a diploid individual that incorporates enough genetic material from its hosts to not be rejected by its immune system — in all effects fully replacing the brain in function.   The rest of its body remains suspended in cerebrospinal fluid within the main skull cavity, which still fulfills the role of basic mechanical and immunological protection. A dozen or more short, multi-jointed cartilaginous legs bracing against the skull provide further cushioning against blunt trauma.
 

Aging

Once reaching the adult stage, ahn kereuha have an average life span of circa thirty years. As the vat-grown keurunic husks are capable of outliving their pilot by a fair margin it’s become tradition to prearrange having them donated to medical science or organ transplantation upon the ahn kereuh’s death.   Relatives of prominent members of the species can apply to have the deceased pilot and its keurunic husk preserved within the Grand Halls of the Enlightened at the capital city of Meina, Llucav.
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Discover More

Biology
Indexes:
Conditions A-ÖSapient Species A-ÖSentient Species A-Ö
 
Life in the Galaxy
Spheres:
AnimaliaAntumbraInfomorphaMersanidaMicrobaMicrotaNeronidaPhotonidaPlanteaSuprata
Dissimulex:
Ahn KereuLus SelecRanomaruSamleonUyetsoub
Related:
AblateocosisPlenumeiosisAscendancy-Revered Cheusal War
 


Cover image: by geralt

Comments

Author's Notes

This'll be expanded on and completed after Summer Camp.


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Jul 19, 2025 23:15 by Dr Emily Vair-Turnbull

A sapient parasitic species is fascinating, specifically due to the ethics. Most of the ethics seem to be pushed upon them due to the laws of others, so I am curious what they think of having to use vat grown hosts. I suppose it is a safer way to have a healthy host.

Emy x
Explore Etrea | Summer Camp 2025
Jul 20, 2025 10:44 by Nimin N

I feel they'd have split opinions about the matter. I can imagine some animate media discussions panels on advantages (real or imagined) of ecological versus synthetic husks. :)   Some that's 'pro-eco' might get hung up on the topic of free choice, disturbing their natural cycle, or the limits they might face in their ability to personally express themselves through a vat-grown husk. The 'pro-synth' might weigh more on the safety/health angle, a hopeful future for more widespread acceptance, and the ethical concerns.