Yokai

Biodata

Feature	Details
Name	Yokai
Original	妖怪
Classification	Supernatural beings associated with Demonic Power; their forms include animal spirits, object spirits, evil spirits, and humanoid demons
Status	Extant; widespread in the Sengoku Period, but greatly diminished in modern society
First Appearance	Minos becomes a Yokai after exchanging his Three-Eyed Tribe bloodline for the Evil Eye 3

Nature and Origins

Yokai are supernatural entities whose strength is tied to Demonic Power, physical constitution, and—in earlier eras—the abundance of Spiritual Energy, human belief, and fear. The Sengoku Period's constant suffering and widespread belief in monsters created a cycle in which negative emotions birthed Yokai, and Yokai in turn worsened human suffering. 282

In modern Japan, most Yokai have declined into spiritual or near-spiritual forms. Physical Yokai and humanoid transformations have become rare because the environment no longer supports their growth; newly born Yokai may die without absorbing human negative emotions. 291 293

Origin or type	Description
Animal Yokai	Animals that develop sentience and Demonic Power, including demon dragons, Thunder Beasts, dog demons, and river creatures. 325 333
Tsukumogami	Yokai born from old, neglected objects gaining sentience; generally considered low in the Yokai hierarchy. Sakura is a comb-based Tsukumogami. 299
Evil spirits	Spiritual entities that may lack stable physical bodies; many modern supernatural threats fall into this category. 289 293
Hybrid Yokai	Beings formed through the fusion of multiple Yokai or human and Yokai traits. Naraku is an unstable hybrid whose growth is linked to devouring other Yokai. 308 309
Mythological Yokai	Legendary beings at the top of Yokai society, including Yamata no Orochi and Yata no Karasu. 299

Hierarchy

Yokai society follows a strict law of the jungle. Status is determined by personal strength rather than inherited position, political authority, or formal allegiance. Powerful Yokai may subdue weaker ones, while lesser Yokai commonly flee rather than challenge an opponent they cannot defeat. 298 308 314

Rank	Examples	Notes
Mythological Yokai	Yamata no Orochi, Yata no Karasu	Treated as the strongest class of Yokai. 299
Legendary Great Yokai	Nine-Tailed Fox, Shuten Doji	Legendary beings beneath the mythological class; most are nearly extinct in the Sengoku era. 299
Great Yokai / Inu God-class Yokai	Inu Taisho, Sesshomaru, Ryūra	The dominant Yokai class of the Sengoku Period. 299 318
Ordinary Yokai	Hiten, Manten, animal Yokai, Hundred Demons	Common supernatural threats with widely varying abilities. 299
Tsukumogami	Sakura	Usually weak at birth, though exceptional individuals can become dangerous through special circumstances. 299 300

Abilities and Traits

Demonic Power

Demonic Power is the primary energy of Yokai. It can strengthen the body, fuel supernatural techniques, and be absorbed from other Yokai or power sources such as Flesh-Killing Stones. Spiritual Power and Demonic Power differ in refinement and properties, but share enough commonality that highly refined Spiritual Power can oppose or decompose Demonic Power. 279

• Yokai Demonic Power can erode ordinary Spiritual Power more easily than unrefined human Spiritual Power can resist it. 279
• Flesh-Killing Stones are crystallizations of Demonic Power and soul fragments; Minos uses them to increase his own Demonic Power. 279 290
• Demonic Aura can reveal a Yokai's identity even when it assumes a human appearance. 291
• Powerful Yokai may have their regeneration hindered by lingering hostile Demonic Aura. 319

Transformation and Human Forms

Many Yokai can adopt humanoid forms, though the method differs by species and ability. Physical shapeshifting, illusion techniques, mimicry, puppets, and hair-based transformations are all documented. 285

• A humanoid form is regarded as a sign of cultivation and often indicates a stronger Yokai. 283
• Humanoid Yokai are common in the Sengoku Period but nearly legendary in modern society. 291
• Human disguise does not prevent experienced exorcists or Yokai from recognizing Demonic Aura when it is released. 291
• Some Yokai possess no stable form and can perfectly imitate others. 285

Physical Superiority

Yokai generally possess greater vitality, recovery, and durability than humans. Their bodies remain a major component of their fighting strength even when they also wield considerable Demonic Power. 6 357

• Minos's Yokai physiology grants unusually rapid recovery after injury. 6 39
• Yokai bodies are generally much less vulnerable to surprise attacks than human Spirit Users. 358
• Most Yokai weaken physically with old age unless they belong to exceptional types such as plant-based Yokai. 357
• Even strong Yokai are not immune to modern weapons; ordinary firearms can threaten them, while large-scale weapons can overwhelm physically embodied Yokai. 323

Growth Through Fear and Moonlight

Yokai thrive where Spiritual Energy, fear, and negative emotions are abundant. In the Sengoku Period, human belief in monsters directly reinforced their existence and power. 282

• Full-moon light can strengthen Yokai by helping them absorb Spiritual Energy and unlock latent potential. 330
• Minos uses the Hogyoku and Dream Castle to project enhanced moonlight across Japan, raising the strength of its Yokai population over seven days. 330
• Yokai born from pure spiritual energy have mostly vanished in modern society; those sustained by negative human emotions persist more easily. 293

Behavior and Society

Most Yokai are described as chaotic and self-interested. Assistance from a Yokai often conceals an ulterior motive, while greed, territorial conflict, predation, and the pursuit of strength are common motivations. 308 323

• Weak Yokai commonly become subordinates of Great Yokai for protection or survival. 298
• Territorial Yokai may form alliances when faced with an overwhelming threat, particularly when their environment is essential to their survival. 323
• River Yokai are especially dependent on their waters and may unite rather than abandon their territory. 323
• Yokai can be controlled, absorbed, or have their souls extracted through forbidden spiritual techniques. 330

Role in the Story

Minos's Transformation

Minos becomes a Yokai by exchanging his Three-Eyed Tribe bloodline for the Evil Eye. The exchange grants him enhanced potential, vitality, thousand-mile vision, hypnosis, and the ability to enter a Hundred-Eyed Monster transformation. 3

His Evil Eye King Mode later manifests dozens of eyes across his body and greatly increases his strength, speed, and endurance, while also intensifying his battle-hungry impulses. 34

Modern Japan

After entering a modern supernatural world, Minos discovers that his Yokai bloodline corresponds to Yamata no Orochi. He learns to control Demonic Power from Isayama Yomi and begins collecting Flesh-Killing Stones to fill the gap in his evolving power. 277 279 290

Minos absorbs the Spirit Beast Shirouei and its Flesh-Killing Stone, demonstrating a level of power that frightens both the Tsuchimiya family and the Countermeasures Office. 291 293

Sengoku Period

In the Sengoku Period, Minos operates among Great Yokai, Miko, Demon Slayers, and half-demons. He subdues Sakura, identifies Naraku's deception, defeats the false Water God, and takes the Spear of Rain's river authority. 298 312

He later extracts Yokai souls to create Pseudo-Sacred Jewels of Four Souls, strengthens Yokai with Hogyoku-infused moonlight, and harvests the Demonic Power and souls of Yokai burdened by heavy karma. 323 330

World Merger

When Minos moves Japan into the Pirate World, the two worlds' systems begin affecting each other. Spiritual Energy and Demonic Power emerge in the Pirate World, animals begin developing sentience, and future Yokai are expected to arise from them. 332 333