Underworld

The Underworld (アンダーワールド) is the mysterious virtual world in which the Alicization Arc takes place.

The Original Four
The population of the Human World began around 70 Before HWC with 2 families of 8 Artificial Fluctlights each in a small village at the center of the Human World, the village of Centoria. Both of these families had 2 real Rath employees nurturing them, while the rest of the villagers were simulated with placeholder NPCs. The 4 members of Rath raised the first 16 Artificial Fluctlights to adulthood, teaching them everything from reading and writing to cultivation of crops and rearing of livestock to the morality of good and evil. After the Artificial Fluctlights reached the age of 18 and started families of their own, the 4 humans logged out one after another by simulating an "epidemic".

Axiom Church
The Axiom Church was founded around 30HWC (100 years after the creation of Underworld). At the time, the founder and head of the church was a girl named Quinella. Her Sacred Task was one not seen before in Underworld: “Sacred Arts Research.” She soon became very proficient at the Sacred Arts and had discovered many new rituals that people could use in every day life. At the age of thirteen, Quinella decided she didn't want to rule over the people as a lord or baron - she wanted to have absolute control, she wanted to become God. To do this, Quinella started doing “miracles” in front of people, predicting storms and healing sick and injured people in the name of "god". She told the people that a shrine to worship god needed to be built in order to perform even greater miracles, hence a large marble spire was erected in the center of town. This was the beginning of the Axiom Church. Years later when Quinella felt her life was coming to an end, she desperately tried to find a form of Sacred Arts that could manipulate her Life. Even at the verge of death, she still tried chanting various combinations of verses in the hopes of finding something that could help her. One fateful night, when she was just on the brink of death, Quinella discovered the Sacred Art: “Inspect Entire Command list,” and at the bottom of this list was the command that Quinella had been searching for, the one that would let her truly become God.

Human World
The Human World is where the humans live in the Underworld. It's a perfect circle with a diameter that measures around 1500 kilometers. The Human World is bordered by the Mountain Range at the Edge and connects to the «Dark Territory» via the «North Cave», «East Gate», «South Corridor» and «West Gorge».

The Human World is divided into four empires: Norlangarth North Empire, Eastabarieth Empire, Wesdarath Empire, and Southacroith Empire. The capital of all four empires is is their respective side of Centoria, from which the Human World is ruled by the Axiom Church and the four empires. Each empire is separated by the large «Immortal wall» (不朽之壁), which extends from the 4 corners of the Axiom Church and stretches to the Mountain Range at the Edge, thus limiting movement between the empires. An identification handprint is required to cross the Immortal Wall.

About 80,000 people live within the Human World, about 20,000 of which live within Centoria. The 4 empires together have about 2,000 soldiers.

Norlangarth North Empire


Norlangarth North Empire (ノーランガルス北帝国) is the northern empire of the Human World. The empire has fertile grasslands, deep forests and many lakes. Rulid Village is the northernmost village in this empire. Zakkaria is a town to the south of Rulid Village. Deusolbert Synthesis Seven used to be the Integrity Knight overseeing the Norlangarth Empire.

Eastabarieth Empire
Eastabarieth Empire (イスタバリエス帝国) is the eastern empire of the Human World. A defining feature of a resident of the empire is black hair.

Wesdarath Empire
Wesdarath Empire (ウェスダラス帝国) is the western empire of the Human World.

Southacroith Empire
Southacroith Empire (サザークロイス帝国) is the southern empire of the Human World. The Empire occupies an area that consists mostly of deserts.

Edge of Human World
Edge of Human World (人界世界の果て) is the border between the Human World and the Dark Territory.

Mountain range at the Edge
The Mountain range at the Edge (果ての山脈) is the mountain range that surrounds the Human World.

Dark Territory
Dark Territory (ダークテリトリー) is the country of demons. It houses goblins, orcs, etc. It is situated at the other end of the Mountain Range at the Edge.

Law System
The Human World is ruled under the Axiom Church who established the Taboo Index as a supreme law above all, and its objective is to ensue the pacifical live of people and the self-reliance of the live within the human world. The fundamental statement of the Taboo Index is that one cannot lower the «Life» of anyone without a reason.

Below the Taboo Index are the laws established in each one of the four empires, and below it are the rules that apply to certain places such as the Sword Mastery Academy.

Although this system rules the entire world, and has a good purpose, it is full of flaws that people had found to commit evil acts without breaking the law.

It was later revealed that it was actually created by Quinella when she created the Axiom Church to ensure that nobody would be able to find the secret to "level up" as she was doing, allowing her to gain control over the Underworld human residents.

Sacred Tasks
A Sacred Task (天職) is a lifelong occupation assigned to each individual in the Human World. Most people are assigned their Sacred Task at the age of 10 during Spring, with very few exceptions, for example, the children at the Axiom Church who can receive their Sacred Task even at the age of 5 while a child who is very gifted in Sacred Arts may have their Sacred Task postponed to allow them to train their talent. A Sacred Task is usually assigned by a village chief, the ruler of a town, a high-ranking noble with their own territory or a minister from the Axiom Church - the people in charge of the area where the child was born.

The Sacred Task assigned to a person the first time cannot be chosen by the people themselves and, once a Task is assigned, it is impossible for even those who assign the Tasks to revoke them. However, certain tasks can be changed if the person is promoted, for example, a village guard may become a sentry in a local town, a student at the Sword Mastery Academy, and even an Integrity Knight in the end, if they meet certain requirements. Additionally, if a Task is completed (this only applies to Tasks that have an end), the person may choose their next Sacred Task themselves.

In practice, the eldest son of each household is usually given the same Sacred Task as their father: a tool shop's owner's son would continue working in the shop, a guard's eldest son would become a guard and a village chief's eldest son would succeed them as the next village chief. For farmer households, this standard usually applies to their daughter, second and third sons as well, though there are exceptions. People who are assigned Sacred Tasks that do not provide a source of income are given a wage from the village's or city's vault.

Once a Sacred Task is assigned, a person is only allowed to rest from their job on rest days and may not travel in a way that would prevent them from working on their Sacred Task, meaning that mostly only traders could travel long distances, if it is part of their Sacred Task, while an average villager would only be able to travel if it was possible to return to their Sacred Task by the next workday.

Certain Sacred Tasks also have certain benefits, for example, a person who is assigned to be a guard is assigned a real sword to use and may spend time practising their sword skills. Although it is possible for someone to help others with their Sacred Task, it's against the Taboo Index to "have many Sacred Tasks".

Language
There are 2 known languages within Underworld: the Common Tongue and the Sacred Tongue.

Common Tongue
The Common Tongue is the main language used for writing and speaking in Underworld. It is the equivalent of the Japanese language in the real world, though the language is supplemented with a few words borrowed from other foreign languages. However, the major difference from its counterpart in the real world is that only about 1000 kanji, about the equivalent of 30% of JIS Level 1, are used in Underworld, while other words and most names are written in kana. Although the same language is used throughout the Human World, several accents do exist.

Sacred Tongue
The Sacred Tongue is the name given to the English language, though supplemented with a few words from other languages, by the residents of Underworld. This language is regarded as a sacred language used to ask the gods for miracles and is not considered as having any special meaning by the average resident, except for those who study the language for Sacred Arts. The language is mostly used in chanting the verses for Sacred Arts and written in system windows, like the Stacia Window, though a few names are also derived from this language, for example, the Gigas Cedar or the Dark Territory. The language can either be written in the English alphabet or in katakana for easier reading.

Calendar

 * For a list of events in Underworld, see Underworld Timeline.

The humans in Underworld have their own calendar, called the Human World Calendar (人界暦), which was developed by the Axiom Church. This calendar starts dating from about 70 years after Underworld was created, as the Axiom Church attempts to maintain the falsified history that it spread throughout the Human World. As the time flow in Underworld depends on the Fluctlight Acceleration rate set, the HWC cannot be aligned with the time in the real world.

Like its Japanese equivalent, the HWC has 12 months per year and, like the Japanese calendar, the names of the months are derived from the number of the month, for example, the equivalent of January is the 1st Month (一月), the equivalent of February is the 2nd Month (二月) and so on.

Trivia

 * Although the order of most names in the series use the Japanese order of the person's Last name then First name, as the setting of Underworld seems be the Middle Ages of Europe, the names of Underworld residents use the Western order of First name then Last name.
 * Only nobles and rich and/or famous non-nobles have the right to have a family name in Underworld.
 * The metric system is used in Underworld, however the names for the units have different names for the units, even though they have the same value. E.g. Meters are called Mel, kilometers are called kilolu, centimeters - centimel etc.

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