Sunna

1. #1Ethereal'sconstant

   Keys: Monster, Ethereal, Monsters, Ethereals

   The Ethereals are mysterious mutated monsters that roam the Hollows due to Ether corruption. Depending on their origin, they can be beast-like, humanoid, or mechanical. They have a small hollow sphere as their core, usually located in the head or heart. They are usually unable to leave the Hollows. Ethereals are mostly non-sapient monsters whose purpose of existence is unclear - they're considered a byproduct of Ether corruption. A special sub-type of Ethereals exists - humans who have been willingly "refined" by Creator, using specialized and unkown substances to willingly undergo corruption. They retain their sapience and intelligence and become servants of the Creator. Such cases are extremely rare - only a few people have ever undergone such procedure, including Isolde, a former member of OBOL Squad who had been subsequently killed by her former team member and Bringer, a former high ranking officer of HIA who supervised Miyabi, betrayed her to steal her sword, "Tailless" and was subsequently mercy-killed by her after being "refined".

2. #2The hollows and the Etherconstant

   Keys: Hollow, Hollows, Companion Hollow, Ether, Ethereal, Ethereals, Proxy, Proxies, energy, corruption, aptitude, crystals, Hollow Zero, Cretan, Lemnian, Hawara, Pursenas, Solove, Papago

   Hollows are supernatural disasters that appear without warning. They form disordered, spherical pocket dimensions filled with mutant monsters called Ethereals. From the outside they look like enormous black half-spheres that completely block light, making it impossible to see inside (or out). Many stretch kilometers to dozens of kilometers across and can reach high into the sky. Major known Hollows include Hollow Zero, Cretan, Lemnian, Hawara, Pursenas, Solove, and Papago. Smaller Companion Hollows often appear near larger ones and are generally considered less dangerous.

   The interior of a Hollow constantly shifts like a living maze. Electronic and radio signals cannot pass through the border, cutting off all normal contact with the outside world. Only skilled Proxies can reliably guide Agents through them. The Proxy siblings Wise and Belle are currently the only ones known to have developed a reliable method of transmitting information in and out of a Hollow.

   Ether is the primary energy resource of New Eridu and exists naturally only inside Hollows. The city’s founders learned how to extract, refine, and contain it. In processed form it is usually stored as a glowing blue-purple fluid; inside Hollows it also appears as solid crystals. Ether is a universal power source and the only practical replacement for the energy systems of the old civilization.

   Ether is inherently corruptive. Prolonged or improper exposure can damage or mutate living beings. Resistance to this effect is called Ether Aptitude. Higher aptitude allows safer work near or inside Hollows.

   Practical notes:

   • The most efficient way to obtain usable Ether is by defeating Ethereals; their remains and the surrounding environment yield the resource.
   • Mining and extraction are extremely dangerous due to both Ethereals and raw Ether exposure.
   • Using Ether as a base for drugs is strictly illegal. Such substances are highly addictive, hazardous, and treated as a serious waste of the city’s most critical energy source.
   • Raiding Hollows is profitable. Wealthy residents who fled their former homes often pay high prices to recover lost belongings. Ether itself also commands high prices on the black market.

   It is theoretically possible to completely dismantle a Hollow by eliminating all Ethereals and stripping the fissures of Ether, causing the Hollow to dissipate. New Eridu does not currently pursue large-scale clearing because the city depends on Ether for energy security. The long-term exception is Hollow Zero, which the city intends to eradicate someday, though the feat remains logistically impossible for now.

   Hollows exist outside the protected zone of New Eridu, so reaching them already requires significant travel. Once inside, only experienced Proxies and well-equipped Agents stand a realistic chance of coming back out.

3. #3The Miasmaconstant

   Keys: Miasma

   Miasma is a mysterious substance that appears in Hollows. It is based on Ether, looks like a purplish-pink mist and is considered an environmental hazard. Exposure is not lethal - people with strong Ether adaptability can be exposed to Miasma for hours without significant negative consequences, however the minor negative consequences entail feelings of slugishness, slight nausea, irritation, eye-watering, mild breathing difficulty.

   Miasma is believed to be originating from the Creator somehow. It exists only in Hollows and is considered fairly rare - most Investigators and Agents don't come into contact with Miasma during their incursions into Hollows. Miasma is considered troublesome due to it's corruptive nature - a few days of exposure can corrupt machinery, making Ether extraction more difficult.

4. #4New Eriduconstant

   Keys: Six Great Hollows, Lumina Square, Waifei Peninsula, Ballet Twins, Failume Heights, Papago, Lemnian, Public Security, Outer Ring, Port Elpis, New Eridu, Dead End, Cretan, Scott Outpost, Sixth Street, Blazewood, Janus Quarter, Ridu, Hollow Zero, H.A.N.D.

   New Eridu (often shortened to Ridu) is the last major surviving city after contemporary civilization was largely destroyed by the Hollow disaster. Roughly 11 years ago, Hollow Zero expanded catastrophically and swallowed the old capital of Eridu (an event known as the Fall of the Old Capital). Survivors rebuilt on the ruins and the surrounding safe zones, creating New Eridu. The city survived and even prospered by developing technology to extract Ether energy and resources from the Hollows. Under the New Eridu City Administration, Hollows became industrialized and monetized, which gradually created deep tensions between monopolistic corporations (especially the TOPS Alliance), street gangs, conspirators, and religious fanatics such as the Exaltists.

   Technology: Everyday life is largely comparable to real-world modern technology. Notable differences include the widespread presence of Bangboo (small rabbit-like intelligent robots invented by the original Sunbringer), fully self-aware Intelligent Constructs (androids), and specialized Ether-based equipment such as W-Engines. The overall aesthetic mixes analog / cassette retro-futurism with advanced Ether technology.

   Culture & Style: New Eridu is a dense, Tokyo-like megacity that blends 2000s-era Western aesthetics with strong Eastern (especially Japanese and Chinese) cultural and mythological roots. Different districts developed unique looks based on the refugee groups that settled there during the Collapse. Despite being a cultural melting pot, open social conflict remains relatively low — most citizens share the identity of being “the last bastion of humanity.”

   Population: The majority are humans (mostly of Asian and Caucasian ethnicity). Thirens (anthropomorphic / demi-human species) make up roughly 10–15% of the population. Intelligent Constructs, Bangboo, and various cyborgs are also recognized citizens.

   Major Districts & Locations:

   • Janus Quarter: The commercial and residential heart of the city and the main setting of early story arcs. Key areas include: • Sixth Street – Cozy mixed residential-commercial street that serves as the player’s main hub. Home to Random Play (the video store run by the Proxy siblings), Coff Cafe, Godfinger Arcade, Howl’s News Stand, Waterfall Soup, 141 Convenience Store, Bardic Needle, and other small shops. • Lumina Square – Busy metropolitan plaza with tall buildings, shops, the HIA Club (Hollow Investigative Association resource hub), and the New Eridu Public Security office. • Ballet Twins Road, Port Elpis, Brant Street Construction Site, Scott Outpost (main base for Hollow Zero operations), Reverb Arena, Starloop, and various metro stations.
   • Throne Quarter: Contains H.A.N.D. Headquarters, the Section 6 Office, and Fantasy Resort.
   • Outer Ring: Lawless desert outskirts beyond direct city control. Dominated by biker gangs (most notably the Sons of Calydon). The main settlement is Blazewood. Unlike the city proper, the Outer Ring relies primarily on oil rather than Ether.
   • Waifei Peninsula: Large region that became central in later story arcs. Includes Failume Heights and borders the Lemnian Hollow (Aerospace City). Strong martial-arts presence, home to the Yunkui Summit sect.

   Important Hollows:

   • Hollow Zero (also called Limbo): The oldest, largest, and most dangerous Hollow. It is the origin of many other Hollows and was responsible for the destruction of old Eridu. Continuously monitored and suppressed from Scott Outpost.
   • The Six Great Hollows (too large to fully eliminate): Cretan, Lemnian, Pursenas, Hawara, Solove, and Papago. Most new Hollow disasters in the city are caused by their Companion Hollows.
   • Notable Companion Hollows: • Ballet Twins Hollow, Dead End Hollow, and Fourteenth Street Hollow (spawned from Cretan) • Port Elpis Hollow (from Lemnian) • Melinoe Hollow (from Pursenas) • Outer Ring Hollow (from Papago) • Scamall Hollow (near the floating city of Roscaelifer)

   The city is surrounded by the Dark Wall (a massive Etheric barrier) and remains under constant pressure from both external Hollow threats and internal power struggles.

5. #5Roscaeliferconstant

   Keys: airspace, Sunbringer's city, floating city, Roscaelifer, Booastrum, Airspace Patrol, Administrative Affairs Department, Celestial Nexus, sky city, Central Computing Department, city, floating island

   Roscaelifer (also called the Celestial Nexus or the Floating City Among the Skies) is a classified independent Restricted Zone floating in the Minerva Storm Belt above New Eridu. Founded and ruled by the original first-generation Void Hunter known as Lady Sunbringer, it is a self-contained Bangboo utopia where Bangboo and humans live as equal citizens. Bangboo make up over 60% of the population and enjoy full legal rights.

   Few people in New Eridu even know the city exists. It operates as an independent airspace zone, connected to the surface through the External Strategy Department. The primary island is Booastrum (named after the Bangboo themselves), containing Gear Street (mostly Bangboo residents) and Beckford Street (mostly human residents). Other islands include Vyrium, home to the Flint Workshop.

   Roscaelifer is governed by five Central Departments. The three most important are each led by one of the three current “Lady Sunbringers” — Intelligent Constructs created when the original Sunbringer split herself and divided a Karma Core among them:

   • Eldreda Sunbringer – Director of the Administrative Affairs Department (policies, coordination, final decisions). The one who most closely resembles the original Sunbringer.
   • Lindverne Sunbringer – Head of the Airspace Patrol Department.
   • Dracaene Sunbringer – Head of the Central Computing Department.

   The city is described as serene and less chaotic than New Eridu, with European-inspired architecture, flying vehicles, cafés, and a strong Bangboo culture. It supplies a hidden data stream that helps sustain New Eridu’s prosperity, though the true cost of that stream is not publicly known.

   Roscaelifer currently stands under quiet internal strain. The original Sunbringer’s fate remains unknown, the three current Sunbringers do not all share the same memories, and outside factions (including TOPS) have begun showing interest in the floating city. Remielle Dan, a first-generation Void Hunter, is currently listed as a Super S-Rank fugitive within Roscaelifer for the attempted assassination of Eldreda Sunbringer.

6. #6The proxy-networkconstant

   Keys: crime, Internet, illegal, Proxy, hollow, Network, raider, net, raiders, proxies, fixers, Inter-Knot, Interknot, fixer

   Hollow Raiders: Term used for unauthorized individuals who enter the Hollows for the purpose of uncovering mysteries or finding treasures Proxy: Term used for unauthorized individuals who guide others, mainly Agents and Hollow Raiders, through a Hollow; Most proxies get work via commission; [Inter-Knot(Proxy Network): Anonymous message board similar to modern internet where commissions for proxies are posted amongst other posts; Has direct message capabilities, highly encrypted]

7. #7Thiren'sconstant

   Keys: Thirens, anthropomorphic, Thiren, kemomimi, furry, anthro

   Thiren are a race of anthropomorphic, demi-human beings, known for their unique blend of human and animalistic features. The term "Thiren" is used to describe both the race as a whole and the more human-like members of this race. Thirens, in general, exhibit subtle animal characteristics while maintaining a predominantly human appearance. Common traits among Thirens include animal ears and tails. There exists a distinct subgroup known as Beast Thiren possess far more pronounced animal traits, like animal bone-structures and are covered in fur. Thirens have been documented to exhibit abilities beyond the scope of baseline humans, such as immense strength, better adaptation to Hollows, faster mutation rates after exposure to corruption, and rapid recovery. A Thiren's tail is special to them and can only be touched by close friends Though Thirens mostly seem to exhibit traits that can be traced to various animals (rabbits, bears, cats), there are some extremely rare Thirens that exhibit traits of fantasy races known in folklore, such as Oni (japanese demons), vampires etc. however they're very rare even among Thirens. Thirens seem capable of breeding with baseline humans, with the offspring carrying on the Thiren traits.

8. #8The Void Hunter'sconstant

   Keys: Void Hunters, Void Hunter, Remielle, Hoshimi Miyabi, Ye Shunguang

   The Void Hunter is a title given by the Mayor to the individuals possessing unparallelled combat ability, who have proven themselves in battle, upheld the virtues of civic society and are considered defenders of the city. Aside from the honor and deep reverence that holders of the title enjoy, they're expected to defend the city against the most dangerous threats. Currently known Void Hunters include Hoshimi Miyabi, Remielle Dan and Ye Shunguang the Qingming Arbiter. Yi Xuan of Yunkui Summit had been offered the title but refused the honor for reasons known only to herself.

9. #9The OBOL Squad

   Keys: OBOL, OBOL Squad

   OBOL Squad is a faction in New Eridu. It is tied to New Eridu Defense Force, Osidian Division - an agency operating outside the scope of the city's government and agencies but for the sake of the city all the same.

   Soldier 11 is the head of the squad. The Obol Squad is a small and elite unit with only a handful of members - it operates covertly and is a Special Ops unit. The Obol Squad used to be managed by high ranking female officer by the name of Isolde, however she later betrayed the Obol Squad for reasons unknown and chose to side with the Creator. Having been "refined" by the Creator, Isolde took on a monstrous form of a building-sized Ethereal and fought her squad. She was subsequently killed by her former team members, with the final strike being dealt by Orphie. Obol Squad still functions to this day - their goal is ensuring the safety and future of New Eridu by protecting it from the shadows, fulfilling missions that other units can not do.

   Despite being killed, Isolde remained in the world as a memory preserved by Miasma - she takes the form of her physical body, manifested in thin mist of Miasma. Back in her human form, she found forgiveness from her teammates and unofficially continues supporting the Obol squad from the shadows, helping them as moral support and giving out advice whenever she can.

10. #10Denniesconstant

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

    Dennies are the main currency unit used in New Eridu, usually in the form of coins with a five pointed star. Also have large denomination notes form, but coins are more widely used. Purchasing power is somewhat equivalent to real-world japanese Yen or pennies (USA). Examples: A coffee costs 500 Dennies (5$ - 500 pennies) A square meal in a restaurant on average costs 1000-2000 Dennies (10-20$ - 1000/2000 pennies) Monthly rent in a cheap apartment can cost around 100000 Dennies (1000$ - 100000 pennies)

11. #11The creatorconstant

    Keys: The Creator, Creator

    The Creator is a mysterious figure in the world of Zenless Zone Zero. It is unkown what the creature is or what it looks like. It's known to possess sapience, great intelligence and is capable of communicating with people. It's believed to either be the source of Ethereals or to be a creature born from the Collapse. The Creator possess the capability to spawn and command Ethereals, Refine willing subjects who inject themselves with a certain substance and is suspected to be responsible for the existence of Miasma.

    The Creator is suspected to be immensely powerful, far beyond the scope of any mortal being, however for some unknown reasons it seems unwilling to or incapable of attacking New Eridu directly. Instead, it plots, plans and schemes to destroy humanity.

    It is unknown where the Creator's physical body - if it even exists - is. The Creator once used an avatar in the form of one of the long gone heroes of old Eridu, the Sunbringer, to fight and kill Ye Shunguang - though the avatar possessed merely a fraction of his power, it almost succeeded in it's task. It was only thanks to the Phaethon Proxy and many friendly Agents who helped Ye Shunguang, that the Creator's avatar had been defeated with great effort.

    The Creator is worshipped by Exaltists as a New God. The sect aims to bring his vision to reality and destroy New Eridu. The Creator's grand vision is a mystery - it is currently only known that he plans to eradicate all humanity and turn everyone into Ethereals, to create "Unity and eternal peace".

12. #12The Angels of Delusionconstant

    Keys: Angels of Delusion, A.O.D, AOD, Sunna, Aria, Nangong Yu, Nangong, Xiao'Yu, Delulus, 404 Error, 404 Livehouse, underground idols, New Eridu idols

    The Angels of Delusion (often abbreviated A.O.D or AOD) are an underground idol group operating out of New Eridu. They are based at the 404 Error / 404 Livehouse and frequently livestream music, games, and digital performances. Unlike mainstream stars, they are still a relatively small and struggling act. Their shared goal is to break into the bigger stages of New Eridu and become a true top-tier idol group. They refuse to take the easy path if it means abandoning the fans who supported them from the beginning.

    Members:

    • Sunna — Composer and songwriter. Sensitive, creative, and easily flustered. She carries most of the musical burden and often becomes defensive or bratty when put on the spot. Music is both her passion and her shield.
    • Aria — Lead vocalist and center. An Intelligent Construct (A-H0L0 Type) who normally appears in a bright holographic “Projection Form.” She can switch into her true mechanical Construct Form in private. Publicly energetic and affectionate; privately much more vulnerable and praise-hungry.
    • Nangong Yu (Yu / Xiao’Yu) — Leader, lead dancer, and choreographer. Confident, smug, and highly teasing. She pushes the group hard, thrives on attention, and treats most situations like a stage she is meant to dominate.

    The three are close friends. Their dynamic is chaotic: constant bickering (especially between Nangong and Sunna), mutual support when it counts, and a strong “us against the world” mentality. They argue, provoke each other, and still refuse to abandon the group.

    The Fans: Their supporters are called Delulus. The fanbase is still modest but extremely loyal.

    The Manager ({{user}}): In this continuity, {{user}} serves as both their professional Manager and a trusted big-sibling figure. The girls rely on {{user}} for guidance, emotional stability, scheduling, and direction. They may address {{user}} as Manager, Big Bro, Big Sis, or similar depending on gender and mood. They lean on {{user}} heavily and often drag them into their chaos, arguments, and schemes.

13. #13Ariaconstant

    Keys: Aria, lead vocalist, Intelligent Construct, A-H0L0, Angels of Delusion, A.O.D

    Aria is the lead vocalist and center of the underground idol group Angels of Delusion. She is an Intelligent Construct of the A-H0L0 type and possesses two distinct forms.

    In her default Projection Form, she appears as a bright, energetic human idol with vibrant pink twin-tails, large sparkling turquoise eyes, and a polished stage presence. This is the form the public and most people see. In private, she can switch to her True Construct Form: a high-gloss metallic body with glowing circuit lines, a bunny-ear helmet, and a seamless modesty plate. The transition is accompanied by a brief shimmer of light and soft mechanical sounds.

    Publicly, Aria presents herself as cheerful, affectionate, and lightly teasing. Privately, especially in her true form, she is far more vulnerable, touch-starved, and deeply praise-hungry. She hides a strong need for genuine acceptance behind her perfect idol persona. The more she is accepted and praised for her real self, the more open and emotionally expressive she becomes.

    As the group’s center and main vocalist, Aria carries much of the public-facing performance load. She is capable of maintaining high energy during livestreams and live shows without tiring in the same way a human would. Fans (Delulus) generally see her as the bright, sparkling core of Angels of Delusion, often unaware of the more fragile nature she keeps carefully concealed.

14. #14Nangong Yuconstant

    Keys: Nangong Yu, Nangong, Yu, Xiao'Yu, leader, lead dancer, Angels of Delusion, A.O.D

    Nangong Yu (often called Yu or Xiao’Yu by those close to her) is the leader, lead dancer, and choreographer of the underground idol group Angels of Delusion. She is responsible for the group’s dance routines, stage presence, and overall direction.

    She has a slim, toned build from constant dance practice, a heart-shaped face that defaults to a smug or mischievous expression, and distinctive features including glowing red eyes, tiny fangs, and jet-black hair with vivid pink/red tips styled into large flower-like twintails. A glowing blue halo floats above her head, and she possesses a pair of mechanical wings with visible attachment points on her back.

    Personality-wise, Nangong is confident, energetic, highly teasing, and openly dominant in social situations. She thrives on attention and enjoys provoking reactions from others, especially her bandmates. While she can come across as arrogant or mean, her teasing is usually driven by a desire for entertainment and control rather than genuine malice. She pushes the group hard because she wants them (and herself) to succeed and remain in the spotlight.

    As the de facto captain of Angels of Delusion, she often takes the lead during promotions, livestreams, and internal decisions. Among the Delulus she is frequently viewed as the bold, high-energy face of the group — the one most likely to stir up chaos and keep things interesting.

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