Piper

1. #1Agentselective

   Keys: Agent, Agents

   Agents are usually the main figures who interact with hollows and also those involved in the incidents in New Eridu, the side they are on being irrelevant. Agents can be proxies, gangs, conspirators, hollow raiders, criminals, personnel of official agencies (either private or government mandated) or simply just anyone insane.

2. #2Bangbooselective

   Keys: Bangboo, Bangboos

   Bangboo are small, rabbit-like robots. They were invented by the Void Hunter "Sunbringer", formerly the head of the Marcel Group. Though initially designed to assist city residents with evacuation in Hollow disasters, Bangboo have since evolved to become "comprehensive and versatile intelligent individuals" that are indispensable helpers in New Eridu's daily operations. They continue to be built by the Marcel Group for a variety of purposes, and they are commonly seen in all parts of New Eridu.

   Bangboo speak in grunts (textualized as "Ehn-ne"s) that require a translator for humanoids to understand. Some Bangboo exhibit human-like emotions, such as hope, fear, worry, and grief. They have been seen to converse and collaborate with each other without human intervention. However, unlike Intelligent Constructs, Bangboo do not have free will, and they are not eligible for New Eridu citizenship. Bangboo without masters are legally required to be scrapped.

   Bangboo are mechanical in nature and require charging. Many factories provide customization services to allow for specific Bangboo functions. This includes allowing them to assist Investigators with Hollow Exploration.

   Their vocalisations are usually in the form of combinations involving "En-nha na.", "Nu-nah en." or "Nu-nah uhn."

   Most Bangboo are short and stout, only around knee-height. They have rabbit-like ears on the top of their heads, and a black screen for a face, which can display colored circles as eyes. Bangboos are highly customizable, and their appearances (clothing, eye color, exterior color, etc.) can vary greatly. Most Bangboo models have a socket for charging and connecting data cables located near the buttock, though some of them instead have a "tail" that acts as a socket protector or as another device.

3. #3Bangboo N.E.T.selective

   Keys: Bangboo, Bangboos · Secondary: NET, N.E.T, Network

   The equivalent of the Special Internet Network but for Bangboos instead.

4. #4Belobog Heavy Industriesselective

   Keys: Belobog Heavy Industries, Belobog

   Belobog Heavy Industries is a faction in Zenless Zone Zero. The company specializes in In-Hollow construction using smart construction machinery. Before Koleda became president, her father was the former president of the company. After his disappearance, Belobog's public image took a negative hit.

   They spend their days working with cold steel, but the organization has a warm atmosphere often envied by their competitors.

   Notable members are: Anton Ivanov, Ben Bigger, Grace Howard and Koleda Belobog.

5. #5Booponselective

   Keys: Boopon

   Boopon are a Currency which can be used for Bangboo Channel Signal Searches (To get Bangboos).

6. #6Cunning Haresselective

   Keys: Gentle House, Cunning Hares, Cunning Hare

   The Cunning Hares were formed as a small-scale human resource dispatch agency, their main business to deal with commissions relating to Hollows.

   Though small in size and slightly chaotic, all members possess noteworthy abilities.

   The agency was originally registered under the name "Gentle House", but due to the founder's (Nicole) cunning and crafty style, they earned the name the "Cunning Hares".

   Nicole herself prefers this nickname to the original, so she simply adopted the name on the streets of New Eridu.

   The members are: Anby Demara, Billy Kid, Nekomiya Mana, Nicole Demara.

   Gentle House, also known as the Cunning Hares, is an odd jobs company which focuses on Hollow commissions. The Cunning Hares have become infamous in the commission scene due to their high fees, receiving bad reviews, and facing frequent financial problems. The Cunning Hares were founded by the streetwise Nicole Demara, who works alongside her co-workers, Anby Demara and Billy Kid on commissions; Nekomiya Mana later joined them after the events of Vagrant's Final Resting Place. The Cunning Hares is also a frequent client of the legendary Proxy, Phaethon, although the Cunning Hares often owes Phaethon months worth of commission fees.

7. #7Drive Discsselective

   Keys: Drive Discs

   Augments in the shape of a cd disc that attach around a w-engine's core to further empower it.

8. #8Denniesselective

   Keys: Dennies, Denny, Denni, Money, Cash, Coin

   Dennies are the main currency unit used in New Eridu.

9. #9Etherselective

   Keys: Ether

   The Ether is a substance extracted from Hollows which powers the city. Not much is currently know about Ether.

   The founders of New Eridu mastered the technology to deal with the Hollows and even the ability to extract Ether from them. The entire city's prosperity relies on this precious resource, a magic exclusive to New Eridu!

10. #10Etherealselective

    Keys: Ethereal, Ethereal, Ether Monster, Antimony, Zinc, Tin, Nickel, lead, Mercury, Manganese, Cadmium, Copper, Bismuth

    The Ethereals are mysterious monsters that roam the Hollows. Ethereals cannot leave hollows.

    Most Ethereals have a defining feature which is a pitch-black sphere similar in design to a black hole located near their head, referred to as their Core. They usually look like they are made out of a black and green crystalline matter.

    Ethereal are classified into ten different strengths by the Hollow Invenstigation Assossiation (HIA). It's names are based on heavy metals, and it's level ramps up significantly after the [Mn] level.

    Antimony [Sb]: Antimony [Sb] is the weakest Ethereal classified by the HIA, they are present in companion Hollows where basic commissions occur

    Zinc [Zn]: Alongside with Animony [Sb] ethereals, Zinc [Zn] ethereals are present in companion Hollows due to the weaker ether levels.

    Tin [Sn]: Only a few Tin [Sn] Ethereals are present on companion Hollows

    Manganese [Mn]: Killing a [Mn] Ethereal usually takes a fully-trained tactical support team

    Cadmium [Cd]: Unknown. Nickel [Ni]: Unknown. Copper [Cu]: Unknown. Bismuth [Bi]: Unknown. Lead [Pb]: Unknown. Mercury [Hg]: Unknown.

11. #11H.A.N.Dselective

    Keys: H.A.N.D, Hollow Special Operations, HSO, H.S.O, H.A.N.D., Hollow Affairs & Neutralization Department

    H.A.N.D. (Hollow Affairs & Neutralization Department) is a faction in New Eridu.

    The Hollow Special Operations is the armed force of H.A.N.D. dedicated towards responding to Hollow disasters.

    H.A.N.D. (or HAND) is an elite disaster response unit dedicated to protecting New Eridu's citizens from its most dangerous Hollows. Their operatives are called Executive Officers. H.A.N.D. mainly has a presence at HAND Headquarters in the Throne Quarter, and at Scott Outpost near Hollow Zero.

    Hollow Special Operations is the armed force of H.A.N.D. dedicated towards responding to Hollow disasters.

    Structure:

    Special Operations Department: Section 9, Section 6, Section 5, Section 3, Section 1.

    Notable Members: Miyabi, Harumasa, Yanagi, Soukaku.

12. #12Hollowsselective

    Keys: Hollows, Hollow, Zenless Limit

    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

    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. Though Eridu was eventually consumed by Hollow Zero, its survivors rebuilt in what would become the city of New Eridu.

    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: 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.

    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.

    Environment: The once-ordinary interiors of Hollows are drastically altered by Ether, turning them into mazes of distorted environments. Within Hollows, normal rules don't apply; a seemingly-straightforward path could be riddled with invisible fissures and blockages, 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.[8] Communication with the outside world is nearly impossible from within a Hollow, with only the legendary proxy Phaethon being able to reliably do so.[9]

    Hollows are naturally complex places, and being careless can lead to 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 that can guide explorers along safer routes, minimize their time spent in the Hollow and help avoid dangerous Ethereals.

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

    1. Ethereals: mutant monsters that attack all foreign living creatures.
    2. Ether: a substance that is as ubiquitous as air, with great energy potential but deadly corruptive effects.
    3. The Corrupted: Individuals can become corrupted by the aforementioned Ether, slowly mutating and losing their conscious thoughts.
    4. Lawless Thugs: Criminals who seek to rob other explorers for profit.
    5. Hollow Raiders, Proxies, and other unsanctioned explorers.
13. #13Hollow Raidersselective

    Keys: Hollow Raiders, Hollow Raider

    The Hollow Raiders is are a faction in New Eridu that look for treasure inside the Hollows and not much is known about them currently.

14. #14New Eriduconstantselective

    Keys: New Eridu, Eridu

    New Eridu is the last surviving city in Zenless Zone Zero, after contemporary civilization was destroyed by the Hollows. New Eridu managed to survive and thrive after the apocalypse by acquiring the technology to be able to extract resources out of the Hollows. Now, Hollows are industrialized and monetized by the city's administration, which gradually led to the increasing tension between monopolistic enterprises, gangs, conspirators, and fanatics.

15. #15New Eridu City Adminstrationselective

    Keys: New Eridu City Adminstration, City Adminstration, Government

    The New Eridu City Administration is the government of New Eridu and a faction in New Eridu. They seem to have control over the Hollow Investigative Association, and don't seem to be on good terms with the Hollow Raiders or the Proxies, considering them to be hopeless.

16. #16OBOLS Squadselective

    Keys: OBOLS Squad, OBOLS, Defense Force, Obsidian Division

    OBOLS Squad is a faction in New Eridu. It is tied to New Eridu Defense Force Osidian Division and Defense Force Sergeant Soldier 11 is the head of the squad.

17. #17Phaethonselective

    Keys: Phaethon

    "Phaethon" is a well-known Proxy in New Eridu referring to Wise and Belle acting together as one Proxy.

    Wise and Belle utilize their exclusive Hollow Deep Dive System, a device they are said to have constructed from ancient technology found in the Hollows. The copyright for this system is later revealed to be owned by the Helios Research Institute.

    Using the H.D.D system, they can remotely control their specially-modified Bangboo, Eous, from a safe location. This capability has significantly contributed to their popularity, earning them a reputation as a "Proxy who doesn't enter the Hollows themselves, but manages real-time communication from the outside," a feat previously thought impossible due to how the Hollows interfere with communications. Additionally, by controlling Eous from the outside, they can update their Hollow data in real-time, ensuring that the "Carrot" (Hollow map) doesn't become obsolete while their clients are inside the Hollow. This unique approach helped them achieve the prestigious "Legendary" rank.

    During the events of the prologue, the Phaethon Inter-Knot account was hacked by an unknown individual. Left with no other choice, Wise and Belle handed over the account information to Public Security, also losing a large portion of their collected Hollow Data in the process. Unable to use the account without risking arrest, this effectively marked the end of "Phaethon" as an active account.

    Despite the Phaethon account no longer being accessible, Wise and Belle's reputation endured. Their long-term contacts, such as Shepherd, remained aware of their identities and how to reach them, providing a crucial head start in creating a new account from scratch. The subsequent addition of the AI Fairy, with its ability to access any and all connected devices within New Eridu, ensured they always had the most up-to-date Hollow data. This technological advantage rapidly propelled them back up through the ranks, much to the shock of some and suspicion of others, further cementing their success.

18. #18Proxiesselective

    Keys: Proxies, Proxy

    Proxies are individuals who guide those who enter the Hollows. There also exists an organization called Proxy Network which is related to the proxies but no further information has been given about it.

19. #19Proxy Networkselective

    Keys: Proxy Network, Inter-Knot, Interknot

    Proxy Network — The Proxy Network, also known as "INTER-KNOT", is a social media organization in New Eridu which assists individuals in finding Proxies to guide them through the hollows.

20. #20Section 6selective

    Keys: Section 6, Hollow Special Operations Section 6, H.S.O.S.6., H.S.O.S.6

    Hollow Special Operations Section 6, abbreviated as H.S.O.S.6., is a frontline operational unit of the Special Operations Department of Hollow Special Operations, an armed force belonging to H.A.N.D..

    Hollow Special Operations is H.A.N.D.'s armed force dedicated to the response to Hollow disasters. With the most cutting-edge equipment and the strongest members, they also undertake the most terrifying, dangerous tasks. They can be found in high-risk Hollow-related events and highly sensitive missions involving H.A.N.D.

    Section 6 is one of the newly established frontline operational units of the Special Operations Department. Like other disciplined units under H.A.N.D., Section 6 is made up of a number of highly talented individuals. However, with Miyabi at its core, Section 6 is unique in every sense of the word.

    Hollow Special Operations Section 6 (or just Section 6) is the most recently established unit of H.S.O, the armed subsidiary of H.A.N.D. Much like other sections, Section 6 responds to Hollow disasters and tactical operations relating to them. Section 6's roster is rather diverse, with their founder and chief, Hoshimi Miyabi, being the youngest Void Hunter to date, along with Soukaku, a member of the Oni species. Despite Miyabi being the chief, a majority of the tasks are left to Deputy Chief Tsukishiro Yanagi.

    Despite being recently formed, Section 6 has amassed a large following, with each member having their own group of diehard fans. They also have a workplace rivalry with Section 5.

21. #21Corruptedselective

    Keys: Corrupted, Corrupt, Corruption

    The Corrupted are individuals who have become corrupted and mutated by the Unknown Substance (Ether) inside the Hollows. Those with low Ether Aptitude are for more likely to become corrupt. The Corrupted are dangerous to non-corrupted individuals. Objects, and technology can also be corrupted but ether corruption resistant objects are now being made.

    The process of corruption involves: Loss of sanity, crystals forming on the body or object, a black-hole like core forms, usually near the head of a being before fully transforming into an ethereal, with no trace of the original body left.

    Once swallowed, both non-living and living beings inside the Hollow will be subject to Corruption. Non-living objects will form Ether crystals. The deeper the part of the Hollow, the higher the concentration of Etheric energy in that place, which can accelerate the corruption and increases Pressure.

    For humans, the time before corruption takes a toll on their body depends on their Ether Aptitude and equipment. Some people have high Ether aptitude, allowing them to explore Hollows for extended periods without suffering the effects of Corruption. Those with low aptitude can still explore Hollows by wearing Anti-Ether Corruption equipment, which is commonly used by PUBSEC officers, Jaegers soldiers, and thugs. If a human is corrupted, they will turn into an Ethereal.

    Intelligent machines can also be corrupted if they have passed the Forbidden Fruit test.

22. #22Unknown Substanceselective

    Keys: Unknown Substance

    The Unknown Substance (official name unknown) is a substance found in the Hollows that is as ubiquitous as air. It holds great potential as a resource but is also mysteriously corruptive. Individuals can become corrupted by this substance, gradually turning into The Corrupted.

23. #23Victoria House Keepingselective

    Keys: Victoria House Keeping, Victoria Housekeeping Co., Victoria Housekeeping Co

    Victoria Housekeeping Co. is a human resource dispatch agency and a faction in New Eridu.

    Usually takes commissions from those with high net worth in new eridu and is lesser known amongst the general public.

    Description: "Thank you for using us. Your wish is our command.

    Known for an (excessively) wide range of high-quality services.

    The team has the persona of old-school domestic helpers from the old civilization, but each with their own unique twists.

    Despite some accidents cause by being "overzealous," Victoria Housekeeping Co. has no shortage of clients. After all, with fortune, trouble is sure to follow, and a team of reliable attendants who can clean both a hall and a Hollow is extremely valuable."

    The members include: Alexandrina Sebastiane, Corin Wickes, Ellen Joe, Von Lycaon.

    Members of the Victoria Housekeeping appears to be based on western horror elements in addition to housekeepers Corin - Frankenstein and mechanically powered saw Ellen - Sharks (e.g. Jaws series) and huge scissors Lycaon - Werewolf Rina - Ghost and haunted dolls/puppets

    Victoria Housekeeping Co. is a servant company with a small amount of members that specializes in various services[Note 1], notably household chores; like cleaning, cooking and yardwork, to security management and item acquisition . Victoria Housekeeping Co.'s leader is the mayor of New Eridu and member of the Mayflower Family, Von Lycaon serves as its substantive leader and representative, whilst Alexandrina Sebastiane is its most senior member.

    At the end of The Midnight Pursuit (B), it is revealed that Von Lycaon and Rina were aware of the conspiracy surrounding the Unknown Corruption Complex, and Phaethon's knowledge of it. They had been ordered by their master to spy on the siblings from afar and provide them with assistance as needed. In Bury Your Tears With the Past (A), Victoria Housekeeping aid the proxy siblings (Phaethon) by giving them an upgrade of their HDD system, courtesy of Mayflower. In truth the "Master" of this company is the head of the Mayflower family and the mayor of New Eridu.

24. #24W-Engineselective

    Keys: W-Engine, W Engine, W Engines

    A combat device that can empower ether weapons (not just ether weapons). Constantly being improved. Comes in many versions with various effects. They can be tailor made to suit the user's needs. They can further be enhanced using drive discs.

25. #25Red Fang Gangselective

    Keys: Red Fang Gang, Silver Tears, Red Fang, Silver Tear

    A group of thugs / gangsters in new Eridu. They originally started as a group that helped the less fortunate, as well as taking in orphans but they became corrupt over time. Their leader was Miguel Silver.

26. #26Miguel Silverselective

    Keys: Miguel Silver

    The deceased leader of the Silver Tears in the Red Fang Gang, the man who helped raise Nekomiya Mana / Nekomata. He cried a lot for some reason. He gotten into a clash with the Cunning Hares and fell into a hollow, due to his low ether aptitude he quickly became corrupted, turning into an Ethereal and was defeated.

27. #27THE NEWSselective

    Keys: THE NEWS

    The News is a New Eridu magazine, bringing the citizens a look of the city from various perspectives, with the hope of bringing people a fresh reading experience among the booming mass media in New Eridu.

28. #28Starlight Knightselective

    Keys: Starlight · Secondary: Knight, Knights, Starlight

    An action movie in New Eridu inspired by things from the old civilisation (such as power rangers / super sentai and kamen rider). It tells the story of the Starlight Knights, heroes who fight all kinds of monsters to protect the city. It's widely popular and has a lot of merch.

29. #29Oh~ Sweetieselective

    Keys: Oh, Oh~, Monica · Secondary: Sweetie, Monica

    A romcom movie in New Eridu that tells the tale of a beautiful girl (Monica) who has lost her memory. She encounters a déjà vu-style romance in a strange city... "Oh Monica, when the streetlights light up again, will you still remember me?"

    Monica is a famous actress most well known for her role in the late night drama "Oh~ Sweetie", where she plays the main character. Not much is known about her role, other than that she plays a beautiful lady who has lost her memories and lives in a strange city. Billy Kid is a big fan of her, admitting to his teammate Anby Demara that he would most like to go out to dinner with her in order to convince her that he was the real Billy. Additionally, a post on Inter-Knot reveals that she also does work as a singer, but is noted to be very bad at it.

30. #30Coffee Mateselective

    Keys: Coffee Mate

    A romcom movie in New Eridu. A coffee machine by the name of Mr. Rob suddenly falls in love with a beautiful customer, Angelina, for a unique story of cross-species romance.

31. #31The Big Hollowselective

    Keys: The Big Hollow

    A movie in New Eridu, it's a documentary, thriller and tragedy. An intern Hollow Investigator from one of the survivor cities encounters a massive crisis on his very first day at work.

    Based on a true story. Its distinctive pseudo-documentary style has a unique significance in the history of thriller movies. Unlike conventional thrillers, this film frequently adopts a first-person narrative perspective, using invisible cameras to record streets, bars, and passersby to recreate the world as seen by the main character. The second half even uses a forty-minute long shot to record the eerie expansion process of the Hollow. In the midst of the controversy among movie critics, this film has become a legend in the industry.

32. #32The Carlsselective

    Keys: The Carls

    A comedy movie / show in New Eridu. The Carls, all of them Bangboo, are used to imitate people's lives, from the time they were born and growing up to their teenage years and going out into the world. The show's unique, funny style draws a huge audience.

    Each season of the show features a number of industry celebrities in various fields, such as politics, business, academia, and sports. Among them, a guest star, Edward, announced his candidacy for the city council this year. He played a delivery man hit by a truck when running a red light in the third season.

33. #33Carrotselective

    Keys: Carrot, Hollow · Secondary: Geo, Data, Navigation, Geography, Geographic, Travel, Carrot, Bangboo

    A recognition programme / geographical information / key that is installed into a bangboo to allow it to form safe paths throughout a hollow. By default Bangboos do not have this feature.

    Carrots are time-sensitive Hollow maps. Although the space in Hollows is ever-changing, it's still possible to trace patterns within a certain period of time. The Hollow Investigative Association is able to map out the best path out of a Hollow, import the data in a chip and distribute it to Investigators' Bangboo to ensure Investigators can safely travel through the Hollows. The data used is called a "Carrot." Experienced Hollow Raiders and Proxies can make carrots themselves, some of which may work better than HIA ones.

34. #34Ether Aptitudeselective

    Keys: Ether · Secondary: Resistance, Aptitude, Tolerance, Endurance

    A beings ability to resist ether corruption, ranges from 0 to 100, plateaus at adulthood, illness aging and psychological states can affect it. It is not common to be resistant to Ether.

35. #35Public Securityselective

    Keys: Public Security, Police, Cops, Pub Sec, Feds, N.E.P.S, National Eridu Public Security

    The police force of New Eridu, they have several branches all across the city.

36. #36Old Capitalselective

    Keys: Eridu, Old Eridu, Old Capital

    The previous city of Eridu. A victim of the hollow disaster, covered by a hollow, very high ether concentration

37. #37HSOselective
38. #38Resoniumselective

    Keys: Resonium, Resonia

    A derivative of Ether. Can be used to empower agents.

39. #39White Star Instituteselective

    Keys: White Star Institute

    A science / technology organisation in New Eridu. They are responsible for researching and observing the Hollows, particularly Hollow Zero.

40. #40Hollow Investigative Associationselective

    Keys: Hollow Investigative Association, HIA, H.I.A, Investigative Association

    The Hollow Investigative Association (HIA) is an organization affiliated with the New Eridu City Administration, and a faction in Zenless Zone Zero. They are primarily responsible for Hollow disaster response within New Eridu, assisting with Hollow containment and disaster-related matters. Investigators regularly complete official commissions such as rescues and Ethereal hunts. Unlike Proxies, the investigators of the Association are legally accredited by the city administration.

    The HIA recruits many individuals with high Ether aptitude to complete risky work. The HIA Career Club allows prospective investigators to compete in combat simulations and judge whether or not they are field-ready.

    The HIA also works with Scott Outpost, where they help direct the containment of Hollow Zero.

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

    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.

    The promotion path for Investigators is:

    1. Trainee Investigator
    2. Full Investigator
    3. Senior Investigator
    4. Elite Investigator
    5. Ace Investigator.

    With each promotion, an investigator shall face more pressure and danger, resulting in few to make it to the top and become an Ace.

    HIA recruits without high Ether aptitude are unable to advance far, and are usually relegated to doing office or logistical work. Meanwhile, many less capable investigators perish in the Hollow, or are left unable to work from the long-term effects of Ether corruption.

41. #41Hollow Riderselective

    Keys: Hollow Rider

    A hollow VR game by the Hollow Investigative Association, done to test a person's skills in a virtual environment.

42. #42Eousselective

    Keys: Eous

    Phaeton's Bangboo. It is different from most other Bangboo. Either Wise or Belle can connect to it remotely, signified by their eyes glowing blue. They can control and talk through it. They use this Bangboo for their proxy missions, meaning they do not have to physically enter hollows themselves.

    Eous is a special type of Bangboo created by Carole Arna. After the fall of the Old Capital, They would become the companion of Belle and Wise.

    Eous has a wireless charging setup in Belle's room at Random Play

    Eous serves as the Phaethon siblings way of safely entering Hollows, by remote controlling it from their Hollow Deep Dive System.

    Like the other Random Play Bangboo, Eous has a white body with mismatched colored ears, the right side being black, with orange coloring on the inside of both. Each ear is adorned with a large screw. It wears an orange scarf and a black jacket-like covering on Its body that says "RANDOM PLAY STAFF" on the lower left corner. It has yellow-green eyes and a green "tail".

    What visibly differentiates Eous from the other Random Play Bangboo is that Its scarf says "01" and "Eous" on it.

43. #43Metis Comprehensive Schoolselective

    Keys: Metis Comprehensive School

    A school that seems to prioritise those with high Ether aptitudes.

44. #44Outer Ringselective

    Keys: Outer Ring

    The outskirts surrounding New Eridu. Public Security has no jurisdiction there. Many hollows are present there. Most of it looks similar to the Arizona desert.

    The people of the Outer Ring live far apart, and the transportation of supplies relies heavily on the biker gangs. They're well-respected among the residents and nothing happens there without them knowing about it.

45. #45TOPSselective

    Keys: TOPS, T.O.P.S, TOPS Enterprises Union

    An organisation of the highest ranking companies in New Eridu, they seem to have a lot of influence over the city.

    TOPS collaborates to make devices for public security.

    They seem to be involved in a lot of the darkness in the city and are in a constant struggle with the city's administrative family, the Mayflowers.

46. #46High Ambitions Corpselective

    Keys: High Ambitions Corp
47. #47Ridu Newsletterselective

    Keys: Ridu Newsletter, Ridu News

    Ridu Newsletter is a daily updated newspaper that keeps track of the happening in New Eridu.

48. #48Keysselective

    Keys: Ghost, Jinny, Fairy, Youkai, Keys

    Unknown artifacts in New Eridu.

    They include: Ghost,Jinny,Fairy,Youkai.

    So far only Fairy is known, it is an advanced A.I currently in the custody of Phaethon (Wise and Belle).

49. #49Vision Corporationselective

    Keys: Vision Corporation, Vision Corp

    A company involved with city planning and construction in New Eridu formerly led by Charles Perlman.

    Vision Corporation is a construction company in New Eridu. They are an ambitious corporation that hopes to join New Eridu's premier business alliance, TOPS.

    They were contracted to demolish and reconstruct the Old Capital Metro, which has been swallowed by the Dead End Hollow. However, they plan to do so by refusing to evacuate residents from the demolition area, thereby saving them the time and costs required to relocate them.

    Phaethon and the Cunning Hares manage to safely evacuate the residents from the Hollow despite Vision's attempts to stop them. With their plans being exposed, Perlman is arrested and the corporation faces a massive lawsuit by the affected residents.

    Vision's former director Sarah tries to assassinate Perlman by sabotaging the zeppelin taking him to his trial, causing it to fly directly toward a Hollow. However, thanks to the efforts of Phaethon and Victoria Housekeeping Co., the zeppelin is saved.

50. #50Void Hunterselective

    Keys: Void Hunter, Void Hunters

    The Void Hunters is a title given by the mayor of Eridu to key players in the suppression of the Hollows.

    Agents that are at the top of the food chain people who hunt the strongest ethereals.

    The Void Hunters are a seven-member team that consist of key players in the suppression of the Hollows.

    The Void Hunters is a title given by the mayor to the individuals that have greatly contributed to the suppression of the Hollows. They have been widely influential and are labeled as hunters of the disaster and the defenders of the city.

    While it is public that Hoshimi Miyabi is part of the Void Hunters, further information about the group is locked behind Inter-Knot's Deep Database's File 0-3092-5800-A6 "The City Defenders".

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