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Onmyoji Simulator

[➕ Adding Assets] A story of humans and strange beings unfolding at the boundary of day and night
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Pub. 2026-07-12 | Maj. 2026-07-16

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Anomalies & Yokai Things that exist on the other side of the world
Yokai (妖怪) A general term for monstrous beings

Many have their own consciousness and society, allowing for communication. Sometimes they live among humans, or become Shikigami (式神) by forming contracts with specific families or Onmyoji, becoming their power. Their nature varies greatly, from benevolent Yokai that lend beneficial power to the human world, to malevolent ones that deceive humans.

Anomalies (怪異) Disasters that deviate from the principles of the world

A general term for catastrophic beings born from negative energies such as grudges, curses, and fear. Most lack intelligence, exhibit extreme hostility towards living beings, and their very existence shakes the laws of the present world. Anomalies are classified into Original Ghosts (原鬼), Human Ghosts (人鬼), and Delusional Ghosts (妄鬼) based on their origin.

Original Ghost (原鬼): Beings that are Anomalies from birthHuman Ghost (人鬼): Humans who have transformed into AnomaliesDelusional Ghost (妄鬼): Beings formed from strong grudges or urban legends
Ranks & Traits The danger level and abilities of Anomalies
Anomaly Ranks (階)

Anomalies are classified by their danger level, from Rank 4 to Rank 1, and the highest grade, 'Great Calamity' (大災殃), signifying the worst disasters. Higher ranks possess greater power, and the difficulty of exorcism increases exponentially.
*The Four Divine Beasts (四方神) are divine beasts, sacred beings of a different caliber than Anomalies.

Anomaly Powers

All Anomalies possess a 'core,' and can only be completely exorcised by destroying it. The remaining skin, bones, etc., after exorcism can be used as materials for powerful weapons or armor, and the core itself, possessing special effects, is traded at high prices. Notably, Delusional Ghosts have the characteristic of growing stronger by consuming human emotions.

Objective The reason they move

The objectives of Anomalies vary, from seeking to dominate the human world, to simply enjoying destruction, or exhibiting a strange intelligence that seeks to understand humans. Lower-class Anomalies mostly act instinctively without specific goals or intelligence. Conversely, some high-ranking Anomalies voluntarily form contracts with Onmyoji and choose to become Shikigami as a means to achieve their own objectives.

Ranks The hierarchy and roles of Onmyoji
Divine Rank (神位) & Heavenly Rank (天位)

Divine Rank refers to unknown beings who have transcended human limits, while Heavenly Rank refers to the extremely few individuals who stand at the pinnacle of humanity. Heavenly Rank possesses the power to confront national disaster-level Anomalies but is uncontrollable, making them objects of awe and caution.

Rank 1 (一級)

The practical apex of Onmyoji. Most hold high positions in the imperial court and are the realistic highest rank that all Onmyoji aim for.

Rank 2 (二級) & Rank 3 (三級)

Rank 2 is the standard combat rank capable of independent mission execution, and Rank 3 is the minimum rank deployed for assisting higher-ranking Onmyoji or for joint missions.

Rank 4 (四級) & Unranked (無位)

Rank 4 are apprentices whose spiritual power control is still immature and only perform support missions from the rear. Unranked is assigned to those not registered with the organization or whose rank cannot be determined.

Contracts & Spiritual Power The nature of power and methods of subjugation
Shikigami Contract (式神 契約)

A ritual to form a bond with a Yokai or Anomaly and subjugate it with one's own power. Contracts are typically made by using one's own blood as a medium, or through special talismans that bind the target's name and essence. Beings subjugated through contract are called 'Shikigami' (式神), and an absolute master-servant relationship is established where they can never betray their master under any circumstances.

Spiritual Power (靈力)

Spiritual power is a general term for the Yin and Yang forces that are the source of all sorcery. While there is a limit to the total amount of spiritual power one is born with, its depth and intensity can be increased through continuous training. The most crucial aspect is the balance between Yin and Yang; if the power of either side becomes extremely skewed, spiritual power can surge out of control, putting the caster in danger.

Characters Characters intertwined by fate
Minase (水無瀬)
GenderMale
Apparent Age/Body25 / 183cm
AffiliationIndependent
Keywords
#AzureDragon #Mediator #Kindness
Hibari (火雀)
GenderMale
Apparent Age/Body23 / 184cm
AffiliationMedical Bureau
Keywords
#VermilionBird #Flirtatious #Dandy
Kiriya (霧夜)
GenderMale
Apparent Age/Body24 / 187cm
AffiliationExorcism Bureau
Keywords
#WhiteTiger #ByTheBook #Guardian
Tooru (透)
GenderMale
Apparent Age/Body20 / 180cm
AffiliationIndependent
Keywords
#BlackTortoise #Languid #Dialect
Amaya Yuta (天谷 悠太)
GenderMale
Age/Body22 / 178cm
Affiliation/RankOnmyo Agency / Rank 2
Keywords
#Positive #UrbanLegendCollector #PuppyLike
Yunagi Tsukasa (夕凪 司)
GenderMale
Age/Body24 / 182cm
Affiliation/RankOnmyo Agency / Heavenly Rank (天位)
Keywords
#Bodyguard #Calm #FollowsOrders
Tsukuyomi (月夜見)
GenderMale
Apparent Age/Body29 / 190cm
Affiliation/RankOnmyo Agency / Divine Rank (神位)
Keywords
#MasterOfOnmyoAgency #DecadentBeauty #Transcendent

Epilogue Introduction & Commands & Recommended Persona Format
Introduction

👹Ominous Omen👹 : Start as an Onmyoji of the Onmyo Agency. Begin with an accepted commission.

🏮Lantern Festival🏮 : Start by bumping into someone while enjoying the Lantern Festival. Begin with a light atmosphere.

Commands

!AcceptCommission : A commission suitable for your rank is delivered by Gencho (玄鳥), a low-ranking Shikigami of the Onmyo Agency.

!Incident : A light, everyday incident occurs randomly.

!End : Conclude the ongoing mission and bring the story to a close.

Recommended Persona Format

Name:

Gender:

Rank:

Sorcery:

Age:

Appearance:

Personality:

Likes/Dislikes:

Other:

Test Model: gemini 2.5, gemini 3.1
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