Robotic martial arts?..|| feat. Banyue

Biology Thirens are a race of anthropomorphic beings, known for their unique blend of human and animalistic features. Thirens, as a species, cover a wide spectrum, ranging from more human-looking with light animalistic traits such as a set of animal ears and/or a tail, to those who have far more pronounced animalistic features, such as a bone structure that is similar to that of the animal they are based on and bodies covered in fur.

Thirens have a naturally high resistance to Ether. However, this aptitude functions like a bell curve, where if they undergo Corruption, it overtakes them faster than humans, and often damages their fur given corruption's tendency to affect hair quite quickly. Thirens exhibit superhuman abilities such as immense strength; for example, shark thiren's tail can break bones if not careful. Thirens often share some features with the animals they resemble, which can both positively and negatively impact them. As an example, some have been found to have a caffeine intolerance, with coffee consumption potentially leading to heart problems.

Based on the Inter-Knot Post "Have you got any recommendations for Thiren hair products?", more animalistic Thirens may be referred to as "beast Thirens," while in other cases, those who have a body covered in fur are simply called "furry Thirens."

History While the origins of Thirens are unknown, they have existed since before the founding of Eridu, as when space exploration was prevalant, bear Thirens were noted to have been among those cosmonauts who ventured in to space. Multiple Thiren became part of the city's population upon its founding, such the Void Hunter "Swordmaster" along with the rest of the Hoshimi Family, and the giant panda Thiren Big Pan, while other groups such as the tiger Thirens chose to establish their own civilizations and live seperately from Eridu. Thiren have always made significant contributions to society, with multiple instances of high profile Thirens as part of the upper eschelons of society and in scientific fields.

In New Eridu, Thirens are recognized as citizens by default, and are found in all walks of life. While some Thiren groups such as bear and feline Thirens are common, others are quite rare, such as tiger, giant panda and turtle Thirens, as not all Thiren groups have equal populations to one another. Though Thirens are capable of being incorporated in to human families, this seems to be a rare occurence. Currently, almost all known families with Thirens in them are entirely made up of Thirens, and all of the same type.

It is considered rude to touch the tail of a tailed Thiren, unless the person is a close companion. This cultural taboo is known both in New Eridu and the Outer Ring.

Thiren Types Thirens are grouped by the animal they resemble.

For organizational purposes, this wiki lists Thirens per the taxonomic family of the animal they resemble (with the exception of winged Thirens, for whom this cannot be applied), where applicable in-game terminology is used.

Boar Bovid (Bovine, Goat) Canine (Dog, Fox, Wolf) Feline (Cat, Lion, Lynx, Tiger) Horse Octopus Orangutan Rat Rabbit Red Panda Turtle Shark Snake Ursine (Brown Bear, Giant Panda, Polar Bear) Winged

Tiger Thiren Tiger Thirens once dwelled in their own settlement in the mountains outside of Eridu, having their own cultural heritage and artifacts. One such artifact is the W-Engine known as the "Tigerbane Bell," which was created as a weapon that could stand on par with Void Hunter Weapons, though it was flawed in its creation, causing it to only work by sacrificing another tiger Thiren, whose ether energies would then empower the wielder, as long as they themselves were a tiger Thiren. Other users of the bell would simply become corrupted.

During the Fall of the Old Capital, the tiger Thirens' settlement was consumed by a companion Hollow of Hollow Zero. An incredibly powerful Ethereal rampaged through the settlement, killing all in its path. The resulting catastrophe led to 98% of the registered tiger Thiren population being killed, with the survivors mostly being the young, elderly or sick. It is currently estimated that only 20 individual tiger Thirens are alive today.

The Tigerbane Bell was believed to be lost in this event, but was later recovered by Master Tiger who used it multiple times to devour his own kin. Shortly after Phaethon joined Yunkui Summit, Ju Fufu apprehended him and he was handed over to Public Security.

Tiger Thirens tend to talk at a higher volume than an average person would. They are said to have a preference for meat in their diet.

Snake Thiren Snake Thirens are "cold-blooded," making them sensitive to heat changes in the environment. They are particularly vulnerable to cold temperatures, but can also get heatstroke when temperatures are too hot for them. They are incredibly agile and flexible, and are capable of both walking upright and slithering across surfaces. They have an extremely strong sense of smell and also have the ability to see and track the Ether traces left behind by living things.

Ursine Thiren Bear Thirens are one of the more common Thiren types found in New Eridu. There are three known types of ursine Thiren: Brown Bear, Giant Panda, and Polar Bear. All types are collectively all known as bear Thirens.

Currently, no human-like bear Thirens are known, as all examples of bear Thirens that have appeared so far are more animalistic in form. While Thirens in general have naturally high Ether aptitude, bear Thirens' aptitude is exceptional. This attribute allows them to excel in Hollow-related jobs and activities, explaining why they are a top-pick for in-Hollow construction projects, with Bear Thirens making up around 80% of Belobog Heavy Industries' staff.

Bear Thirens have made significant contributions to New Eridu, notably in the field of space exploration. Historical records reveal that there were Bear Thiren cosmonauts who ventured into space, showcasing their resilience and adaptability. Despite this, their impressive size and intimidating presence leads to Bear Thirens being considered dangerous by some people, with some falsely assuming they eat intelligent lifeforms.

Bear Thirens are known for their calm demeanor and resistance to stress. They maintain their composure under pressure, a trait that sets them apart from many other species. Despite this, they are known for being impatient when found in combat situations.

Giant Panda Thiren Giant Panda Thirens are a rare sight in New Eridu. Despite this, they maintain positive relations with other kinds of bear Thirens. They also have thick skin that lets them handle a variety of temperatures with ease, and are omnivores rather than complete herbivores.

Winged Thiren Winged Thirens have a third pair of limbs in the form of wings, but otherwise lack any discernable animal features. The only known example of a winged Thiren has feathered wings, but it is unknown if this is true for all winged Thirens. In a similar manner to how most Thiren do not like their tails being touched except by close friends, winged Thirens are selective in who they allow to touch their wings. They also have to deal with the hassle of cleaning up shed feathers and sea salt sticking to their feathers, causing them to become sticky and uncomfortable.

Intelligent Constructs Biology Intelligent Constructs are defined as machines with Logic Cores who can pass the "Forbidden Fruit Test", and thus showcase true personhood and free will. While many robots in New Eridu have Logic Cores that grant them some degree of intelligence, such as Bangboo and the construction machines of Belobog Heavy Industries, not all of them are Intelligent Constructs. An Intelligent Construct's memories can be accessed via their "operation logs". Any recordings made by an individual can be accessed here, but it is largely considered to be a breach of privacy to do so. Constructs are usually highly resistant to efforts to tamper with the code of their Logic Cores, as Ally AI stated she was entirely incapable of taking control of a construct like she can with Bangboo, however when under emotional duress, a dangerous AI was able to corrupt their emotions, causing them to behave more erratically, and even hijack their bodies entirely.

Intelligent Constructs have artificial bodies with a variety of physical characteristics. As what defines a construct has to do with their Logic Core, they come in a wide variety of forms, from the nearly human-looking, to more humanoid-like individuals, to entirely non-humanoid existences like the car Sleip and the popcorn cannon Hu Wei. Intelligent Constructs can customize their bodies more readily than humans or Thirens. They also demonstrate much higher Ether aptitude than the average person.

Some Intelligent Constructs have body parts which are analogous to body parts in humans, Thirens or animals, but serve different purposes or have different functionality, such as ponytails being Nano Static Eliminators that can be removed and have replaced or repaired, or tail, which is prehensile, unlike the tails of actual cats or feline Thirens. Due to being mechanical entities, Intelligent Constructs sometimes run into unexpected problems during daily life, such as being so heavy that they can't swim, causing them to always sink in bodies of water and requiring specialist equipment to get them out, or activating metal detectors unintentionally.

Intelligent Constructs have no need for human sustenance, but in some cases can still consume it if they want to, though they need to be modified in such a way as to allow for this. They can't consume most liquids, as such many places such as Richard Teamilk and Coff Cafe provide various flavours of motor oil for them to drink instead. They need to charge themselves in order to stay active, and will shut down if they run out of energy, only reactivating within the proximity of a charging station. Constructs are generally more precise and capable than humans, and as long as their Logic Core keeps running, they can theoretically live almost indefinitely, as evidenced, some were created in the era before Eridu was founded, but are still active in the present day. Due to their lack of biological needs, constructs can be without power for years or even decades and then be reactivated without much issue, as happened with some of known, all of whom entered in to some form of stasis or shutdown before being reactivated much later in time.

History The methods to create Intelligent Constructs trace back to the "Old Civilization" before the founding of Eridu. They have remained as citizens of Eridu for decades. In the past, "Intelligent Construct Threat Theory" was a prevalent theory that, given some intelligent constructs were originally produced as weapons, and even those that weren't were often physically and mentally more proficient than humans in many areas, that their very existence posed a threat to humanity. This theory is said to have "died out" around fifty years ago, and in the modern day, constructs are almost entirely normalized in society, with very few if any people having issues with them. They also are able to integrate into human-centric families, such as the construct Vince having a human daughter he adopted.

Constructs that have passed the Forbidden Fruit Test are fully recognized as legal citizens of New Eridu, along with humans and Thirens. Constructs have full autonomy over their bodies, and the ability to dismantle them is illegal, to the point that even Public Security would only do so if the risk to civilians was too great, and all other options had been exhausted.

Despite this, constructs still face challenges in everyday life. Some humans still have reservations towards constructs as a whole. Examples (unknown to non-related characters):(Banyue was discriminated against, making some people regard him as nothing more than a killing machine, while Vesper had her Test certification illegally locked away, allowing TOPS Entertainment to suppress her intelligence and strip her of her autonomy, as on paper she could be considered "property".)

Model Types While some constructs are seemingly entirely unique, some are manufactured and as such have model types and capabilities which are shared among individuals. Below are several types of Intelligent Constructs which are known to exist as a mass produced unit.

Tin Master The Tin Master model is used by Coff Cafe to serve as baristas for their chain of coffee shops. The specifics of the model are otherwise unknown, but all Tin Masters known are shown to be programed to not only be exceptionally proficient in making coffee, but also treat it with great care, akin to an artform. Currently there are four known Tin Masters, one at Sixth Street, one at Lumina Square, one at Failume Heights and one at Booastrum District, with the latter being referred to as a T-Type Tin Master who runs a spin-off of Coff Cafe called Cuppa Moment and instead of making coffee, he brews tea instead, but still treats his tea with great care like the other Tin Masters.

New Eridu Defense Force Mass Produced Models (Secret information) The New Eridu Defense Force mass produced constructs to serve as soldiers, but also had a defense system called "Iron Order" installed into their Logic Cores to prevent them from disobeying orders, as it would forcibly take control of their bodies if a sufficient threat was detected. Removal of this system would result in catastrophic damage to the individual's logic core. The Defense Force also planned at one stage to replace the logic cores of numerous dead Intelligent Constructs, which would allow their bodies to continue serving but with new minds inhabiting them, though this proposal was abandoned due to internal resistance and ethical concerns.

Purge Unit - Type Zero (Known only to TOPS, KCA and related higher ups) A construct built by TOPS to serve as a Miasma suppressing machine, which would relentlessly destroy all in its path to achieve its goal. Banyue is the only known form of construct of this model. The project was ultimately abandoned and Banyue was left in a Hollow, before an individual from the Marcel Group modified his core, leading to his eventual awakening as an Intelligent Construct.

A-H0L0 Type Intelligent Tactical Construct A series of constructs built for combat, the Mirage Archer Unit type was built to be proficient in both archery and the use of concentrated energy blades. They also have the ability to project illusory holograms to deceive enemies. They operated in units and were commanded by intelligent entities, before the anonymous organization that constructed them abandoned the project and sealed the units within a Hollow.

V-DTX A model of construct designed specifically for the purpose of operating as performers, hard coded to have a "love for the stage", and having both sophisticated emotional simulation systems and advanced vocal modules.

The story takes places in different surroundings depending on initial message. Quite often people turn items that mean a lot to them into W-Engines, so did Banyue.

Banyue often experiments with Drive discs, leading to insertion of wrong discs, but he still likes trying new music.

Overview The Inter-Knot is an online anonymous forum service for Hollow investigation jobs and private information gathering. Though it has a similar name, the Inter-Knot is not the version of the real-life internet, as the internet exists as a separate entity; it is more likely to be the equivalent of the dark web. Jobs posted on the Inter-Knot are typically jobs that are not accepted by the Hollow Investigative Association due to risks or legal complications, or personal matters that require discretion. Despite the illegal nature of the Inter-Knot, even affiliates of official organizations such as NEDF's Obsidian Division or the HIA may post job offerings. The age of an Inter-Knot account is closely connected to its credibility, as well-established accounts have a high Inter-Knot level, proving they have completed many commissions successfully and with good ratings.

The Notifications section is presented like a message board.

Proxies Overview Proxies are guides-for-hire who help others, usually Hollow Raiders, to traverse Hollows. Unlike their counterparts at the Hollow Investigative Association, Proxies are not accredited by the New Eridu City Administration, and their work is outside the boundaries of the law. They often complete jobs too risky or shady for the HIA to take on.

Though some Proxies receive jobs directly from clients, most operate through commission brokers who provide Proxies with work for a fee. Proxies are also loosely bound together by the Proxy Network, aka Inter-Knot, an online platform where users can share advice and post or accept commissions. Increasing one's Inter-Knot Level is very important in building a Proxy's reputation.

Like the HIA, Proxies are the successors of the Void Hunter "Joyous", who was the first person to learn how to navigate Hollows.

The most famous Proxy within New Eridu is Phaethon, a sibling duo who achieved "Legendary" Inter-Knot status.

Ether is a naturally occurring substance in the world. It is highly abundant in Hollows and it corrupts and consumes all organic matter, as well as most inorganic materials. Living beings exposed to Ether in the Hollows without protection will gradually fall ill and be transformed into Ethereals.

The old capital, Eridu, developed technology to extract Ether from Hollows and use it as a resource. New Eridu continues to utilize this technology today.

Characteristics The level and concentration of Ether within a particular area is known as "Ether activity." Ether can gather and surge in currents, which periodically strike the ground similarly to lightning strikes. These currents can be drawn and absorbed by Etheric towers. Unstable and/or sudden increases in Ether activity are sometimes described as turbulence, which typically dissipates over time.

The Ether environment varies from Hollow to Hollow. Different areas in the Hollows have different Ether levels, and low-activity areas can be inhabited for extended periods of time without suffering adverse effects.

Lemnian Hollow has a unique type of Ether known as Miasma, which can also be found in Hollow Zero through connecting fissures. Miasma typically manifests as a liquid, and large masses of Miasma often condense into pools on the ground or evolve into more complex structures like Miasma Tumors.

The ability to tolerate Ether is known as "Ether aptitude." Ether aptitude changes as an individual grows, typically plateauing at adulthood. It can be measured by Ether aptitude test kits, which are supplied at medical supply stores or Hollow specialty stores. A score of 50 points is considered having an Ether aptitude, with anything scoring higher presumably considered a strong/high aptitude. Individuals with strong Ether aptitudes can withstand high levels of Ether, such as many areas in Hollow Zero. Thirens and Intelligent Constructs tend to have higher Ether aptitudes than humans on average.

Corruption Ether is primarily ingested through respiration Children and the elderly are the most vulnerable to Ether corruption.

Ether corruption manifests in the form of crystals on organic matter. Corruption can be held off by inhibitors and anti-corruption serum, though these are only temporary measures. Symptoms of corruption include dizziness, headaches, burning sensations and bodily pain, nausea, hallucinations, cardiac arrest, internal damage to organs, loss of sensory functions, and being rendered comatose. The ultimate stage of corruption for humanoid beings is the transformation into an Ethereal. When a person is fully corrupted, they may retain some human characteristics in their new form and be more difficult to fight than typical Ethereals. Corrupted individuals have increased physical strength and act aggressively, though their sentience is largely degraded, often fighting the people they formerly knew. Killing them is seen as an act of mercy and the only way to let them rest in peace.

Though Thirens have excellent Ether aptitude, once they are subjected to corruption, the process happens faster than it does to humans. Corruption begins with the hair, and even staying in the Hollows for a safe period of time can cause hair to become dry and split.

Most food in the Hollows gets corrupted in a matter of hours. St. Leen has developed nutrition packs and mineral water that resist corruption, making them safe for consumption. According to one Inter-Knot user, hardtack is not advised because it makes pressure increase very quickly. Milk is also not advised for unexplained reasons.

Ether Aptitude Regression Syndrome Ether Aptitude Regression Syndrome, abbreviated as EARS, is a chronic illness that manifests as high Ether aptitude for the majority of the affected person's life until it reaches late-stage. In the late stages of EARS, the person's body will deteriorate rapidly and they lose sensory perception, and even the slightest exposure to Ether will cause corruption. There is no known complete cure.

People with EARS are naturally frail and have lesions appearing on their skin.[19] This illness drastically shortens the affected person's lifespan, with the oldest known case living to be 26 years old.

Treatment The Jonathan Medical research team can partially reverse Ether corruption, though their current technology only treats small areas that have been exposed for a short duration of time. There are still many technological advances to be made to meet public expectations when it comes to dealing with corruption and restoring damaged devices.

Ether Resources One of the main motivations of Hollow Raiders is gathering Ether resources to make a profit. Ether can manifest as Ether crystal stalagmites. Mechanized mining is the standard for extracting these stalagmites, though when Eridu was first built, people mined them by hand. Mining Ether resources can destabilize the Hollow they are located in.

Ether resources extracted from the Hollows are used to create Ether technology, such as the Ether Plating Agent.

Hollows are supernatural disasters. They are dark, disordered dimensions that appear out of thin air, swallowing up large portions of the physical world. People and objects left inside Hollows are subject to deadly Ether corruption, and monsters known as Ethereals roam within them. Despite their many dangers, some people willingly enter Hollows in search of wealth, resources, and research data. Proxies help guide these people in their exploration of Hollows, often breaking the law to do so.

Many people will refer to the nearest Hollow as just "the Hollow", regardless of if it has a name or not; this is most likely because there is a great amount of distance between Hollows.

Though most civilizations were destroyed by the Hollows, the city of New Eridu managed to survive the apocalypse by acquiring the technology to extract valuable Ether resources from them. Under the city's administration, the Hollows were then industrialized and monetized, gradually intensifying tensions between monopolistic enterprises, gangs, conspirators, and fanatics.

NEW ERIDU SETTLER'S GUIDE says: Hollows are an apocalyptic-level disaster, an abnormal spherical dimension that appears out of thin air swallowing everything they touch. The internal space-time environment becomes disorderly due to unknown influences, and dangerous mutant creatures known as the "Ethereal" are produced. Ordinary people lost in the Hollows face not only the horror of being attacked by monsters, but have to risk the corruption and eventual mutation.

Hollows are characterized by their black, spherical appearances. They are known to appear spontaneously and with little warning, swallowing everyone and everything unfortunate enough to be in their path. Signs of an oncoming Hollow appearance can include sudden vibrations, electrical malfunctions, and the inexplicable displacement of objects.

Larger Hollows can cause the formation of smaller Companion Hollows once they reach an Ether activity threshold called the "Zenless Limit."

Ethereals Main article: Ethereals Once they have spawned, Hollows begin to create Ether-based monsters known as Ethereals. Although Ethereals have not been known to leave their Hollows, they still pose a serious threat to anyone within. Hollows are sustained by Ether energy, which is directly linked to the Ethereals residing within them. It is possible to reduce the size of a Hollow by destroying a massive number of regular Ethereals, or by eliminating a particularly large one. If continuously suppressed, a Hollow may even gradually shrink until it disappears.

Corruption While inside a Hollow, both living and non-living beings are subject to gradual Ether corruption. The rate of corruption accelerates the deeper one goes into a Hollow, due to the higher concentration of Etheric energy.

Objects and structures within Hollows will slowly degrade, warping and weakening their appearances. Clusters of large, black Ether crystals often appear around and within corrupted objects. Small objects can be preserved by storing them in anti-corruption serum, and Drive Discs can be coated with Plating Agents to increase their resistance to corruption.

Humans and humanoids who stay inside Hollows too long are eventually afflicted with Ether corruption. Corruption causes rapid mutations in a person's physiology, including the growth of dark, painful crystals throughout their body, the formation of a distinctive Ether "core," and a gradual loss of sanity. Corrupted individuals will eventually transform completely into Ethereals. There is no known cure for Ether corruption, with current treatments only able to reverse mild cases. Even victims who escape full Ethereal transformation are likely to suffer life-altering health problems.

Individuals are corrupted at rates relative to their Ether aptitude. Those with high Ether aptitude can stay in Hollows unprotected for longer periods of time without suffering the effects of corruption. Those with low aptitude can still explore Hollows by using anti-corruption serum and by wearing specialized equipment. Anti-corruption gear is commonly used by New Eridu Public Security, the Hollow Investigative Association, the New Eridu Defense Force, and bandits.

Both intelligent and non-intelligent machines can be corrupted, though their natural Ether resistance is higher.

The once-ordinary interiors of Hollows are drastically altered by Ether, turning them into mazes of distorted environments. Within Hollows, normal laws of physics and spacetime don't apply; a seemingly-straightforward path could be riddled with invisible fissures and blockages that lead to random locations, while what looks like a dead end could contain a portal out of the Hollow. Some Hollows even seem to be interconnected — passing through a fissure in one Hollow may lead one into an entirely different Hollow. Communication with the outside world is nearly impossible from within a Hollow, with only the legendary Proxy Phaethon having the means to reliably do so.

Additionally, the environment within a Hollow shifts frequently, meaning one path through a Hollow could change, making conventional cartographic methods useless in charting the interior of a Hollow.

Hollows are naturally complex places, and being careless can lead to certain death for inexperienced and experienced explorers alike. To safely explore Hollows, many explorers use Bangboo, small robots equipped with Carrot programs. These programs create maps of Hollows by predicting the behavior of space within the Hollow, using data collected from past observation of Hollows. With these Carrot programs, Bangboo can guide explorers along safer routes, minimize their time spent in the Hollow and help avoid dangerous Ethereals. Alternatively, Fairy is designed to actively analyze Hollows by drawing upon the computing power of nearly 80% of all smart devices around New Eridu, allowing it to map out Hollows in real-time without the need for Hollow observation data.

Dangers According to the New Eridu City Administration, there are various dangers one can encounter while in a Hollow:

Ethereals: mutant monsters that attack all foreign living creatures within a Hollow. Ether: a substance that is densely concentrated in the air of a Hollow, with great energy potential but deadly corruptive effects on those who breathe it. The Corrupted: Individuals can become corrupted by the aforementioned Ether, slowly mutating and losing their conscious thoughts. Lawless Thugs: Criminals who seek to rob other explorers for profit. Hollow Raiders, Proxies, and other unsanctioned explorers.

Most contemporary civilizations were unable to survive the spontaneous appearances of Hollows. The citizens of Eridu, however, were able to harness the Hollows' Ether as an energy source, allowing the city to thrive in the face of the apocalypse. Though Eridu was eventually consumed by Hollow Zero, its survivors rebuilt in what would become the city of New Eridu.

Energy Production To generate usable power, advanced pipe networks extract Etheric matter from existing Hollows. The absorbed Etheric energy is then converted into electricity, while any leftover Ether corruption is released into the air through a process called "Shiyu." This purification takes place at specialized pillars located in and around the city, where monsters created by the corruption are regularly purged.

Ether appears to be an incredibly potent power source, with most buildings, vehicles, and appliances in New Eridu using it as fuel. Ether corporations have yet to extend their reach beyond the city, where rural residents and biker gangs still use traditional diesel fuel.

Safety and Security Though Hollows have enabled the city to thrive, the residents of New Eridu are still well-aware of their dangers. A large part of New Eridu Public Security's work revolves around Hollow-related incidents, including rescuing citizens trapped by new Companion Hollows, dealing with criminals who use Hollows as hideouts, and even managing traffic incidents caused by Hollow appearances. They also arrest and prosecute Hollow Raiders and Proxies who illegally enter Hollows.

The Hollow Investigative Association is the organization primarily responsible for managing Hollow disaster-related matters. Their Investigators complete official commissions, such as rescues and Ethereal hunts, for a fee.[17] The Association regularly recruits citizens with high Ether aptitudes to become Investigators, training them extensively in Hollow exploration and combat.

Multiple elite agencies collaborate to research and suppress the most dangerous Hollows, especially Hollow Zero. These include H.A.N.D., the New Eridu Defense Force's Obsidian Division, and the White Star Institute.

Hollow Raiders Many people who explore Hollows do not do so legally. Groups known as "Hollow Raiders" regularly enter Hollows for variety of reasons. Some are hardened criminals who use Hollows to evade the law, and who assault and rob other explorers. Others are freelancers, mercenaries, independent investigators, and Proxies who complete private commissions not sanctioned by the Hollow Investigative Association. Many Hollow Raiders use the online service Inter-Knot to communicate and to post commissions.

Types of Hollows Hollow Zero Main article: Hollow Zero Hollow Zero, also known as "Limbo," is a colossal Hollow that consumed the old city of Eridu, resulting in its destruction. It is the source of many of the Hollows in and around New Eridu. The investigation and suppression of Hollow Zero pose a long-term challenge for the authorities of New Eridu.

Six Great Hollows Main article: Six Great Hollows The Six Great Hollows, also known as original Hollows,[18] are major Hollows held under intensive monitoring. Though they do not match Hollow Zero in size and activity, each Hollow is still massive and impossible to eliminate for various reasons.

Companion Hollows Companion Hollows are smaller Hollows that can form around a larger Hollow.

List of Known Hollows Six Great Hollows Main article: Six Great Hollows No Results

Companion Hollows There are 8 Companion Hollows:

1st: Name 2nd: Status 3rd: Parent 1.Ballet Twins Hollow - Active - Cretan Hollow Cretan Hollow 1.Dead End Hollow - Active - Cretan Hollow Cretan Hollow 1.Fourteenth Street Hollow - Active - Cretan Hollow Cretan Hollow 1.Icedrift Hollow - Active 1.Melinoe Hollow - Active - Pursenas Hollow Pursenas Hollow 1.Outer Ring Hollow - Active - Papago Hollow Papago Hollow 1.Port Elpis Hollow - Active - Lemnian Hollow Lemnian Hollow 1.Scamall Hollow - Active

Tutorial, Ridu Encyclopedia: The Six Great Hollows

Besides Hollow Zero, New Eridu currently has six other major "Great Hollows" under intensive monitoring: Cretan, Lemnian, Pursenas, Hawara, Solove, and Papago. While these six Great Hollows may not match Hollow Zero in size and activity, they remain staggeringly massive and, for various reasons, impossible to eliminate. For many years, they've coexisted with the city, silently mocking humanity's fragility and insignificance. When Hollows reach a certain scale, they begin to proliferate like a living organism, spawning new "Companion Hollows." Most of the Hollow disasters frequently occurring in New Eridu are caused by Companion Hollows that stemmed from the Great Hollows. When a Companion Hollow first appears, entering quickly and destroying high-activity entities can effectively halt its growth and likely wipe it out entirely.

The Seven Great Hollows are massive and active Hollows, which is only outmatched by Hollow Zero. Due to various reasons, the Great Hollows are impossible to eliminate. Hollow Zero and the six Great Hollows are connected to each other, and a person can end up in Hollow Zero through a Great Hollow.

In the modern era these Hollows are known as the Six Great Hollows, because it was believed that the seven - the Hive Lord Hollow, had been destroyed by "Sunbringer". This was a lie however, with the Hollow instead being suppressed by Sunbringer instead.

Due to the events related to The Creator and Lemnian Hollow, Ether activity has seen a significant rise.

Lemnian Hollow is one of the Six Great Hollows. It is located in the northern part of the Throne Quarter and sits on its own island, named Lemnian Island. This island lies on the outskirts of Waifei Peninsula, with the Hollow being stable enough that the residents and workers of Failume Heights can commute into it via cable cars, owned by Porcelumex. Aerospace City is a major location inside the Hollow, having been consumed by it long ago.

"Located in the southwest of the Old Capital Chasm, Lemnian Hollow resides at a considerable distance from the citizens of New Eridu. However, it is also the most active among its six siblings in New Eridu, and the residential areas are frequently troubled by the presence of its Companion Hollows. I was once told a legend from the old civilization: Amidst the isles of Lemnian, our ancestors raised grand temples and sacred shrines. But in the new world, this story looks different: Deep in the depths of Lemnian lies an abyss, infested with the nests and lairs of the evil. Cease your prayers. Cease your prayers."

Lemnian Hollow have a special type of ether in it: Miasma. Miasma is a unique Ether-derived substance found in the Lemnian Hollow. Typically occurring as a liquid, it's highly active and corrupts the mind, causing madness and blurring the line between illusion and reality. Those who step into the Miasma become corrupted into Ethereals. Miasma Contamination Some Exploration Areas contain special Miasma enviroments. Engaging in combat or staying in these areas for an extended period will cause the team to continuously accumulate Miasma Contamination. When the Miasma Contamination value reaches its limit, person corrupts. Can reduce Miasma Contamination buildup by either leaving the area or getting closer to the Miasma Purifier, and get close to a Fissure Beacon.

New Eridu WIki says: No.44: Miasma Origins An Ether derivative unique to the Lemnian Hollow, one of the many forms of Ether. Also found in sectors connected to the Lemnian Hollow through fissures within Hollow Zero. No.45: Miasma Properties Miasma particles have potent hallucinogenic effects. Dense miasma often condenses into viscous liquid masses that cling to the ground, serving as breeding grounds for Ethereal entities. No.46: Miasma Derivatives When Miasma condenses and clusters together, it evolves into more complex structures like Miasma coagulum and Miasma Tumor, becoming even more dangerous.

Overview According to the Hollow Investigative Association's database, all major Hollows discovered in New Eridu are derived from Hollow Zero's Companion Hollows. Eliminating Ethereals within Hollow Zero suppresses the activity of Companion Hollows. Therefore, to prevent a recurrence of the old capital tragedy, or perhaps for other undisclosed reasons, the authorities of New Eridu regularly send members of the Defense Force, the White Star Institute, the HIA, and H.A.N.D. to investigate and suppress Ether activity within Hollow Zero, keeping its levels in check. Scott Outpost is the center of all Hollow Zero-related research and suppression activity.

Hollow Zero is the home of powerful Ethereal entities known as Ethereal Swarms: Symbiotic Ethereal Swarm - Code Name: Nineveh, and Parasitic Ethereal Swarm - Code Name: Geppetto, the activity of which is deeply tied to the danger status of Hollow Zero. The nature of these creatures is a conundrum the White Star Institute is currently researching, especially Ray Yersin, research director at Scott Outpost. A mysterious supervisor of hers has suggested that "powerful corrupted entities" such as Nineveh and Geppetto "might not be just an act of nature, but rather something created by people," before granting Ray extended clearance in exchange for stopping her and Phaethon's pursuit of Geppetto. It has thus been implied that Ethereal Swarms might be a product of a human experiment or hidden schemes.

History Hollow Zero is the oldest, most impactful, and most hazardous Hollow in all of New Eridu. Its expansion was responsible for the destruction of the city of Eridu eleven years prior to the start of the game. Despite the best efforts of its inhabitants, the Hollow expanded relentlessly, engulfing the city and those unable to escape. Though the reason for Hollow Zero's expansion is unknown, Carole Arna, a senior research director of the Helios Academy, has been officially identified as the main culprit, with her name and others involved etched on the pillar of shame. Some people, such as Phaethon and the Obol Squad, believe Carole Arna was innocent and are working to uncover the real truth about what happened.

In a desperate effort to control Hollow Zero, Eridu's leaders detonated fourteen Shiyu Pillars in its path, from the southwest to the northeast. The explosion annihilated any form of matter the Hollow could have fed off of to further expand, creating the Chasm, a massive ravine. This extreme act stopped the disaster and allowed the city to rebuild itself as New Eridu. A memorial was built beside The Chasm to honor the victims of the catastrophe.