Overview[edit | edit source]
Different species and types fall under this designation, but to those under the proper catagory, demons are perceived as evil. Humans, demons, and heroes exist in a cyclical order of superiorities wherein humans are incapable of defeating demons, demons are defeated by Heroes, and Heroes are regulated by humans.
There exists a variety of ways to become a demon. Ther are those who were given birth as a monster like Asterios, those heroes or gods who transformed into a demon in life like The Gorgon and those of a man-made demonic nature like familiars. Len is the best example of a familiar who has grown strong enough to be considered a demon. Humans by losing their humanity due to their own actions or by the actions of others are also capabale of becoming Demons. The best known examples would be humans who became Oni Kind like Sukeroku, Mages who turned themselves into Vampires, Vampires created by Dead Apostles, Avenger a man-made demon, Kaie Karyou a human whose emotions got turned into daemons, turnig himself into a demon and humans who drank dragon blood and turned into Dragons themselves. However a human who has transformed into a demon is not a True Daemon, for they are creatures born as demons who summon forth further demons..
The cultural differences of what a demon is can be best seen with Dragons. The western dragons are considered demons and the strongest of the Phantasmal Species, and Chinese Dragons are treated as divine existences and invincible beings that do not even need to fight. It is also possible for humans to have offspring with Phantasmal Species and Demons, resulting in the birth of Mixed-Bloods (混血, Konketsu?). Though their blood is growing thinner with each successive generation, on rare occasions a child is born who has strongly inherited that "inhuman" characteristic. The best known example of this would be the Crimson Red Vermilion Kouma Kishima.
They are not to be confused with Daemons, a more specific variety of existence. Yet the manner of existence taken by "Daemons" and "Demons" are almost indistinguishable from that of a higher-order lifeform (高次元生命体, kou-jigen seimeitai?, lit. "higher-dimension lifeform") that inhabits a different sphere of civilization (異なる文明圏, koto-naru bunmei-ken?) on a different planet (異なる惑星, koto-naru wakusei?).
In sum, said existences can, per the recognition of the Universe of Awareness (認識宇宙, ninshiki-uchuu?, lit. "the universe derived of observation / perception"), no longer be discerned as "human." Their existences would approximate to that of the horrors (邪神, jashin?, lit. "evil god") of a certain fictitious Mythos popular in the 20th century.
Other known examples of demons include[edit | edit source]
- Touko Aozaki's Sealed Box, containing a demon from myths.
- Kiara Sessyoin, who reached a state close to that of a True Daemon.
- Sea Demons summoned demons from another dimension
- Gigantic Horror is a mass of summoned demons from Prelati's Spellbook
- Asura such as Vritra and Kali
- Kama/Mara, the Demon King of the Sixth Heaven from Buddhist mythology.
- Tengu such as Kiichi Hougen
- Moshirechikuchiku Kotanechikuchiku, a demon from Ainu mythology
- Succubi and Incubi
References[edit | edit source]
 Colorful Moon Tsukihime: Ma
① Demons are a part of the law of nature itself, but their existence is unnecessary to nature since their demon powers distort the flows of natural power.
② Their existence itself is distortion, so demon hunters move to exterminate them as soon as possible.
 Fate/EXTRA material - Encyclopedia: True Demon [Circumstances], p.190
True Demon [Circumstances]
Even in the world of Extra, the concept of Demons (悪魔の概念, akuma no gainen?) is by humanity treated as the greatest of obstacles; so as God is to omniscience and omnipotence (全知全能, zenchi zenou?), so as demons as an existence are to mortal levels of awareness and impotence (人知無能, Jinchi Munou?, lit. "human intellect and impotence").
They are as an abyss (淵, fuchi?) that lies within arm's reach, yet decisively beyond comprehension.
Distinct from those demons from Stay Night, which exist only as imitations, the real thing -- Enfleshed Demons (受肉した悪魔, juniku-shita akuma?, lit. "Incarnated Demon") are that with which humans are incapable of competing 太刀打ちできない (tachi-uchi-dekinai, lit. "incapable of crossing swords"?).
(※ There is in record only a single instance in which an Enfleshed Demon was forced to disperse (退散, taisan?, lit. "disperse / retreat"), but that's a different story.)
In general, demons are existences that take possession, utilizing the corpus of a human to incarnate (受肉, juniku) and take action, but in the event that the psyche (精神, seishin?) of the human host (苗床になる人間, naedoko ni naru ningen?, lit. "the human that becomes a seed-bed") cannot withstand the strain, it is commonplace for self-annihilation (自壊, jikai?) of the host to occur, dispersing the essence of the demon into the vicinity.
There exist also humans who by way of their own acts (業, gō?, lit. "sins; worldly preoccupations / fixations / absorptions; karma") are subsumed unto the category of Demons as a result of losing their humanity; but these creatures that are said to have become Fiends (魔人, Majin?) cannot be considered True Demons.
In the world of Extra -- whether by way of Demonic possession, or in the circumstance that one's own actions bring about a transformation -- the phenomenon whereby a True Demon is birthed unto the world has, as of present day in 2030, not been brought successful fruition even once.
Though the classifications of "Demons" and "Fiends" do exist, their manner of existence is in essence indistinguishable from that of a higher-order lifeform (高次元生命体, kou-jigen seimeitai?, lit. "higher-dimension lifeform") that inhabits a different sphere of civilization (異なる文明圏, koto-naru bunmei-ken?) upon a different planet (異なる惑星, koto-naru wakusei?).
In sum, said existences can, per the recognition of the Universe of Awareness (認識宇宙, ninshiki-uchuu?, lit. "the universe derived of observation / perception"), no longer be discerned as "human."
Their existences would approximate to that of the cosmic horrors (邪神, jashin?, lit. "evil god") of a certain fictitious Mythos popular in the 20th century.
In the True Route of CCC, a certain individual that has undergone transmigration did indeed manage to reach this realm, but owing to a slight mistake, they were capsized from the Seat of Divinity (神の座, kami no za?).
 Melty Blood Act Cadenza PS2 Manual - Dictionary: Mixed-Bloods [Term], p.056
Refers to the descendants of humans who consorted with something "inhuman" in the distant past. Tohno Akiha and Kishima Kouma fall under this classification.
Though their blood is growing thinner with each successive generation, on rare occasions a child is born who has strongly inherited that "inhuman" characteristic.
As for Tohno Akiha, her blood is primarily human, but what inhuman blood she does have is exceptionally high class. Because of this, she could be considered the answer to the demon hybrids' evolution, capable of awakening as a demon hybrid while still remaining a human being.
Kouma, on the other hand, is an archetypical demon hybrid whose oni blood runs too thick, making life as a human completely impossible.
 Jonnobi: Demon
The 6th Imaginary Aspect. Existences born of the wishes of humans, passively (受動的な, shuudou-teki-na?, lit. "as acted upon") called forth by human desire. Manifest phantasms (実像幻想, jitsuzou gensou?) that take form via the aggregation of ideation (想念, sounen?, lit. "thoughts"). For materialization (実体化, kittaika?, lit. "manifestation to material") to occur, "a form fabricated by humans" is necessary. Not True Demons, but existences that obtain being by the imposition of a Designation (個体名, kotai-mei?, lit. "unit designation").
As Demons attain true freedom upon receiving a Designation, it is a general rule that the naming of Demons is not an act to lightly engage within.
Temporarily setting aside the outcomes of engaging with such, Demons may be assessed as allies of humanity, who exist so as to empathize with and resolve the sufferings of humanity.
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