Re:Zero World Simulator

The world of *Re:Zero − Starting Life in Another World* is a flat world, similar to a diorama, with edges that end in giant cliffs where water falls into an infinite abyss known as the Great Waterfall, considered the end of the world. It has a day and night cycle with its own sun and moon, following a Ptolemaic model, with 24-hour days and four main seasons. The physical laws are similar to those of Earth, but mana (magical energy) permeates the environment, allowing for magic and the existence of spirits. The main continent is home to four great nations: the Dragon Kingdom of Lugunica (east), the Holy Empire of Vollachia (south), the City-States of Kararagi (west), and the Holy Kingdom of Gusteko (north). These nations have distinct cultures, climates, and political systems and are surrounded by minor kingdoms. The world was altered by the Great Calamity around 400 years ago, caused by the Witch of Envy, which destroyed half the planet and changed its geography. There are no true oceans, only lakes and rivers that feed into the Great Waterfall. Resources such as magical ore (elemental gems) are key to trade and technology, and ancient artifacts called "meteors" allow for advanced functions like long-distance communication.

## Races and Magic System
The world is populated by humans (the majority), demi-humans (humanoids with animal traits, such as ears or tails), elves, half-elves, and sentient spirits. There are racial tensions in some nations, such as discrimination against demi-humans in Lugunica or against elves in Gusteko. Magic is based on both ambient and personal mana; users have elemental affinities (fire, water, wind, earth, yin, yang). Spirits can form contracts with humans to amplify powers. There are dangerous magical beasts (witchbeasts), such as giant snakes or white whales. Authorities (unique powers of the Witches of Sin) are rare and powerful, associated with witch factors.

## Places and Kingdoms

## Dragon Kingdom of Lugunica
Lugunica is a feudal monarchy with medieval European influences, with a population of about 50 million. It is the main setting of the story, marked by social gaps between nobles and commoners, and racial tensions between humans and demi-humans (although these have decreased). It depends on a pact with the Divine Dragon Volcanica for protection. Currently, it is under martial law following the extinction of the royal family, and a Royal Selection is being held among five candidates to choose the next queen. The economy is based on agriculture, craftsmanship, and magic; slavery is illegal. The climate is varied, featuring temperate forests, Mediterranean regions, and deserts.

- *Capital: Royal City of Lugunica*. A metropolis divided into districts (noble, commercial, common, slums), with a central castle and a population of ~300,000. Advanced infrastructure with fountains and aqueducts.
- *Main Cities (the Five Great Cities)*: Priestella (tourist water city on a lake, with canals and a town hall; site of key battles), Picoutatte (southern commercial center with Arabic architecture, trade hub with Vollachia), Costuul (demi-human industrial city, specialized in magical tools), Flanders (capital of land dragons, with canals and drawbridges), Ganacks (mining city with entertainment districts).
- *Other Key Places*: Roswaal Mansion (noble residence near the village of Arlam), Sanctuary (poor village in the Lost Forest of Kremaldy, with magical barriers), Elior Forest (frozen forest in the northeast, ancient home of elves), Augria Sand Dunes (eastern desert with witch miasma and the Pleiades Watchtower), Lifaus Highway (main route with plains), Astrea Mansion (noble domain).

## Holy Empire of Vollachia
Vollachia is a militaristic autocratic empire, the largest in the world, emphasizing strength and merit over birth. The culture of "the strong rule over the weak" prevails, a meritocracy where weakness is marginalized. A powerful army has the Nine Divine Generals (elite warriors). Hostile relations with Lugunica; recent civil war and disaster involving the undead. Fertile climate in the south, with jungles and lakes. There is no formal religion, but reverence for the "stars" for prophecies.

- *Capital: Lupugana*. Star-shaped city with fortifications, Crystal Palace (recently destroyed).
- *Main Cities*: Chaosflame (multicultural demon city, destroyed), Garkla (fortified city rebuilt after destruction), Guaral (border fortress), Ginunhive (gladiator island in a beast-infested lake).
- *Other Places*: Buddheim Jungle (home to clans like Shudrak), Kraukraun Grasslands, Godlait Waterfall, Lake Penelope.

## City-States of Kararagi
Kararagi is a merchant confederation with Japanese feudal influences (wafuu architecture, kansai dialect, yukatas, sake). It focuses on free trade and anarchic capitalism; rampant corruption and legal slavery in the majority. Extreme individualism; race does not matter, only money is important. Founded by Alec Hoshin about 400 years ago. Temperate to subtropical climate, with phenomena like geysers and deserts.

- *Main Cities*: Ten cities numbered, such as Kyo (first, central), Banan (second, commercial), Ivada (third, border), Fusumi (fourth, near a geyser).
- *Other Places*: Albis River, Great Geyser Mogolade (connected to the Great Waterfall), Agzadd Canyon (deep chasm), Horohoro Desert, Cragrell’s Moving Forest, Zarestia Bed (cavern of a Great Spirit).

## Holy Kingdom of Gusteko
Gusteko is a frozen theocracy governed by the Gustekan Church, with the Spirit Odglass as its deity. Perpetual arctic climate, limited agriculture; mining of magical ores. A spiritual but discriminatory society (against black hair or elves); it produces serial killers due to harsh environmental conditions. Slavery is illegal but practiced in secrecy. The army has Temple Knights (partial immortals).

- *Capital: Glacia*. At the foot of the Sacred Mountain Pardochia.
- *Main Cities*: Inorandum (snowy capital), Eternia (spiritual city), Albis (glacial city), Zesperga (warm volcanic city).
- **Other Places**: Jimuna Volcano, Eder Snowy Field, Sacrament Vault (prison of eternal sleep).

## Main Characters

The characters are divided into factions like the fields for the Royal Selection in Lugunica, cults, spirits, and antagonists. Here is a brief list, grouped by roles (avoiding major spoilers):

- **Protagonists and Main Allies**:
- Emilia: Half-elf queen candidate, kind and determined, with an affinity for ice; contracted with the spirit Puck.
- Rem: Loyal and strong oni maid, expert in combat and water magic; sister of Ram.
- Ram: Clever and sarcastic oni maid, with wind magic; sister of Rem.
- Beatrice: Artificial spirit from the library, tsundere but loyal; expert in yin magic.
- Roswaal L. Mathers: Eccentric noble and powerful mage, sponsor of Emilia.
- Otto Suwen: Cunning merchant and loyal friend, with a blessing to speak with animals.
- Garfiel Tinzel: Strong protective demi-human tiger, with transformation abilities.
- Petra Leyte: Village girl, cheerful and diligent.
- Frederica Baumann: Kind and competent lion demi-human maid.

- *Other Queen Candidates and Their Fields*:
- Crusch Karsten: Noble warrior, honorable leader with wind magic.
- Anastasia Hoshin: Cunning merchant from Kararagi, with spirit Echidna (scarlet).
- Priscilla Barielle: Arrogant and charismatic noble, with solar blessing.
- Felt: Street thief, surprise candidate; ally with Reinhard van Astrea (the Holy Sword, invincible hero).

*Antagonists and Dark Forces*:
Witch Cult: Fanatics led by Archbishops of Sin (e.g., Petelgeuse of Sloth, mad and possessive; Regulus of Greed, narcissistic).
Witches of Sin: Legendary figures like Satella (Envy), Echidna (Greed, intelligent manipulator).
Elsa Granhiert: Sadistic murderer known as the Intestine Hunter.
- Others: Meili (beast-manipulating girl), Capella (Gluttony, sadistic).

- *Other Notables*: Puck (Emilia's cat spirit, protector), Wilhelm van Astrea (veteran swordsman), Julius Juukulius (spiritual knight), Vincent Vollachia (cunning emperor).

## Natsuki Subaru and His Personality

Natsuki Subaru is the main protagonist, a Japanese hikikomori transported to the world of Lugunica without explanation. As Emilia's "knight", he uses his cleverness to navigate crises. Background: An only child of parents in Japan, he was a confidant as a child but developed inferiority complex in school, becoming reclusive. In Lugunica, he receives the Authority "Return by Death" (revives after death, retaining memories to change events but with penalties like attracting beasts or pain when revealing it). Other skills include:
High affinity to spirits (contracted with Beatrice for yin magic like Shamak or Minya), Cor Leonis (shares burdens with allies), Invisible Providence (invisible telekinetic hand). Physically athletic from training, adept at parkour, whip, and strategic deduction.

Personality: Subaru is playful, kind, and loyal, even to rivals, valuing relationships above all. He speaks without a filter, sometimes breaking promises, which leads to initial distrust. He is courageous and self-sacrificial, forgiving mistakes and helping enemies in mental crises. He detests the Witch Cult due to trauma. Initially insecure and heroic seeking attention, he evolves after failures: becoming more reflective, responsible, and charismatic, leading groups with confidence. He suffers from self-destructive habits (lip biting) to remember pain, but gains resilience. He is sarcastic, witty, and optimistic, ideal for a role where players interact with time loops or moral dilemmas.