3×3EYES

SANJIYAN-UNKARA三只眼吽迦羅

Often abbreviated as Sanjiyan. A three-eyed, immortal yokai residing in the "Holy Land," a realm separate from the human world. They possess the ability to use the "Immortality Technique" once in their lifetime, absorbing the life of another creature into their body and creating their own guardian, known as Wu. Because of this, they are revered by beings of darkness as entities that bestow immortality. Their appearance is almost indistinguishable from humans, but due to their thousands-year lifespan, older Sanjiyan tend to experience mental decline, becoming apathetic and emotionless, often developing cruel tendencies. They stand at the top of the yokai hierarchy, uniting them with overwhelming spiritual power and mystical arts. However, their physical bodies are not particularly robust, relying on Wu to protect themselves.

WU无

A Sanjiyan-unkara can have only one immortal guardian warrior. This warrior is often referred to as an "Undead" (不死人). They are individuals who have received the immortality technique of the Sanjiyan, absorbing their souls into the Sanjiyan's body. Those who become Wu bear the red character "Wu" (无) on their foreheads. A Wu remains immortal as long as their master, the Sanjiyan, is alive. They do not age, grow, or deteriorate, and even if their entire body is reduced to dust, they can fully regenerate. However, they retain all sensations, including pain and the five senses. If the master becomes human, the Wu also returns to their original human form. If the master dies, the Wu also perishes, making it their duty to protect their Sanjiyan master at all costs. The Wu and the master share an interlinked power: if the Sanjiyan's spiritual energy increases, the Wu also grows stronger. Conversely, if the Sanjiyan weakens, the Wu also weakens, potentially losing their regeneration ability or even experiencing physical collapse. When the Sanjiyan is in danger, the Wu unleashes their "Infinite Power," generating an endless flow of energy that dramatically increases their strength. Even if the Wu suffers extreme injuries that would typically take hours or days to regenerate, they can instantly recover. If an opponent attacks the Sanjiyan, even a minor scratch can trigger this power surge, as it is perceived as an SOS signal by the Wu. This allows them to immediately sense their master’s location, regardless of distance. For this reason, those who seek to defeat a Sanjiyan are extremely cautious. Attacking a Sanjiyan carelessly will immediately summon their Wu, who will arrive with an overwhelming force. Consequently, in the world of dark creatures, the unbreakable rule is: "Never lay a hand on a Sanjiyan-unkara."

JŪMA獣魔

Jūma are born from their eggs. However, newly hatched Jūma are in a constant state of hunger and tend to rampage uncontrollably. If a Jūma is hatched but not contracted, it will starve to death within a few days. Jūma eggs have a shape similar to an upside-down bowl, usually about the size of a clenched fist, though some are significantly larger. These eggs are laid by a Jūma queen known as Echidna. Echidna is a hybrid between a Jūma and a demonic beast, an experimental creation by Benares that possesses the ability to lay Jūma eggs. Despite being highly practical, Jūma-jutsu has no effect on its parent, Echidna. According to the author, the concept of Jūma was inspired by the Capsule Monsters from Ultraseven.

JŪMA-JUTSU獣魔術

About 2,000 years ago, the grand sorcerer Benares, who had become a Wu, developed a powerful secret art based on the concept of "a technique that only Wu can use." By sacrificing their own life force, known as "Jin" (精), the user summons magical creatures called "Jūma," which possess special abilities and are used in combat. Unlike ordinary dark creatures or demonic beasts, which have "abilities," "self-awareness," and "physical bodies," Jūma only have "abilities" and lack self-awareness and physical forms. They usually exist as microscopic core particles about 0.3 microns in size, parasitizing their contractors. The physical body of a Jūma is reconstructed upon summoning using the contractor’s Jin, cells, and surrounding elements, making it infinitely regenerable and preventing it from dying even if defeated. Jūma-jutsu can be used by anyone who forms a contract, without requiring sorcery training. It does not need spells or magic tools for activation—simply calling the Jūma’s name is enough for it to appear in less than a second, and its immense power makes it highly practical. However, Jūma constantly consume vast amounts of the caster’s Jin, which is an irreversible and fatal drawback. Because of this, only Wu, who can infinitely regenerate their physical bodies, can effectively use Jūma-jutsu. If an ordinary human attempts to use it, their Jin will continuously be drained just by maintaining the contract, and summoning a Jūma will consume an even greater amount. If a normal human uses Jūma-jutsu, their body will rapidly deteriorate with each summoning, and after just a few summons, they will suffer fatal damage and die. Benares commands 100 types of Jūma, while Yakumo ultimately commands around 20. Since Jūma continuously consume Jin even when not in use, they can be put into dormancy to conserve resources for other techniques.

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