True Ancestor

Unique existences even among the vampires, the are incarnated Nature Spirits, being classified as Elementals, said to be the original bloodsucking species independently established by the Planet as its sense of touch.
Elemental royalty,Fate/Grand Order - Archetype: Earth's profile translated by UdonSamurai at Reddit they are vampiric creatures from birth, however, unlike the Dead Apostles and other blood-sucking species, the root of their bloodlust is psychological rather than physical. Also, because they are part of nature, they can use the power of Marble Phantasm to change the world around them according to their thoughts. 
True Ancestors can be classified as a type of greater fairy and their Foundation is of a Mystery that cannot be reached through magecraft. They are said to be Planet-class Spirits, a rank higher than Divine Spirits. As they receive backup from the Planet, it can be said that the limits of their actions are the limits of nature itself.
==Origin==
At an undetermined point of time in the past, Gaia, the will of the planet, suffered with the indiscriminate corruption that humans caused in the environment. Because at the time it lacked the means to defend itself from humans, Gaia sent a plea to the other celestial bodies for help, on the criteria that only a planet is able to correctly judge another of its kind.Shingetsutan Tsukihime Prologue - 1/ Before thenKagetsu Tohya - Ten Nights of Dream - Crimson MoonTsukihime -A piece of blue glass moon- - Midnight Rainbow route - Day 9: "Arc en Ciel I"
The one who answered Gaia's plea was Brunestud of the Crimson Moon who offered a pact to the planet: in exchange of being allowed to live on Earth, Crimson Moon would allow the creation of a self-defense mechanism for the planet based on him. From this pact between the Ultimate One of the Moon and the will of the Earth the True Ancestors were born as a Counter Force with definite form, created for the purpose of returning the planet to its original state, before the corruption caused by humans. 
Despite their origins as anti-human entities, Alaya does not see the True Ancestors as targets. That is because the True Ancestors are extensions of the World, mediators of nature, before being enemies of humanity.Kagetsu Tohya - Ten Nights of Dream - Crimson Moon /2 However, differently from Divine Spirits, they are supernatural beings born from the World without the interference of people. That which is desired by the planet but not by humanity is bound to fade from the observable world and decline in numbers. When Arcueid Brunestud (Remake) was born in the 12th century, the True Ancestors had decreased to a mere hundred, from which the majority were killed when the White Princess went berserk.
While the birth of a True Ancestor goes along the lines of a natural phenomenon that happens when needed, Arcueid’s case was more of an artificial occurrence premeditated by the other True Ancestors. And yet her appearance is special among the True Ancestors as she was created with a female body which is rare among the True Ancestors, probably because the original Crimson Moon had a male body. Their reason behind this was quite simple: they wanted the advent of a stronger, more perfect existence that would be capable of hunting down their fallen brothers (the Demon Lords) and their renegade children (the Dead Apostles).
==Nature==
In the same way that humans perceive the vampires who prey on them as "evil", from the standpoint of the True Ancestors it is the humans who enjoy the blessing of nature all the while plundering its resources that are "evil".
Unlike Dead Apostles who were once human, True Ancestors are endowed with their predetermined abilities from birth, and are unable to improve them through the sucking of blood.
===Vampiric Impulse===
MaleTrueAncestor.png|An unnamed male True Ancestor succumbing to his vampiric impulses.
Arcueid about to bite Shiki (Remake).jpg|Arcueid about to bite Shiki after nearly succumbing to her impulses.
While being born from nature just as any natural spirits, the True Ancestors are fundamentally copies of the Crimson Moon with minds and bodies modeled after humans, the latter done so under the principle that it would be best for them to resemble those who they are supposed to rule over. Because Crimson Moon was their basis, the True Ancestors not only turned to be detached from nature’s desire of protection from humans but also inherited a terrible flaw from the original: .
A purely psychological impulse that pushes them to suck the blood of others, because there is no physical reason behind those impulses there is no definite cure for them. Thus, the True Ancestors need to sleep through their childhood until they are mature enough to have self-control. Normally, a True Ancestor cannot dream, but in Arcueid's case, she must dream a little since her meeting with Shiki Tohno (Remake). From that point on, the True Ancestors must use their own powers to keep the vampiric impulses in check. That is why, even though they have the capacity to manipulate nature at will, they never fight at 100% as most of their powers is already being used to restrain themselves.
However, because there is no end to the vampiric impulses, they do not disappear and instead accumulate with time. Eventually, those impulses will become too powerful to be restrained and threatens to take over. When they realise that they will become unable to control this impulse sooner or later, the True Ancestors choose eternal sleep for themselves. In a way, this is the lifespan of those who have none to begin with - an end to their long journey.
====Demon Lord====
There is also the case of the , fallen True Ancestors who succumbed to their blood thirst and became a threat both to humans and the True Ancestors themselves. As they no longer needed to suppress their thirst, they could employ their powers to their full extent and therefore vastly overwhelm their still restrained kin. It was with the purpose of their elimination that the True Ancestors caused the birth of Arcueid Brunestud (Remake). 
In the original Tsukihime, all of them had long been eliminated before the events of the story. In the Tsukihime Remake series, at least one Demon Lord survived into the recent past and was nonlethally pacified by Mario Gallo Bestino.Tsukihime -A piece of blue glass moon- - Midnight Rainbow route - Day 12: " Crimson Vestiges II" 
It should be noted that despite the name, they are not to be confused neither with the demonic ethereal beings born from human belief, nor with the oriental demons of Japanese folklore known as Oni.
===Brunestud===
 is a title bestowed upon all True Ancestor royalty who come close in power to Brunestud of the Crimson Moon by displaying the ability to manifest his Millennium Castle Brunestud through Marble Phantasm. While the True Ancestors have no proper concept of hierarchy, those able to manifest the castle have been uplifted as royalty. The only current two True Ancestors to have ever held the name in the entire long history of the race are Arcueid Brunestud (Remake), the White Princess of the True Ancestors, and Altrouge Brunestud, the Eclipse Princess of Black Blood. 
The True Ancestor royalty can also enter a state called (), a phenomenon more simply called . 
==Society==
Prior to his death, Crimson Moon took provisions to make his return possible. All True Ancestors have a Reality Marble implanted within them. Whenever a True Ancestor attains a level of power close to the original, this implanted seed will allow Brunestud to take over his body. Still, because all True Ancestors are born with the fundamental flaw of bloodlust, he needed to create more perfect successors. And so Brunestud decided to teach them how to make their own kind themselves in order to speed up the creation of a proper vessel for his revival. Arcueid and Altrouge are apparently two of such attempts.
Among the True Ancestors, those who could manifest the Millennium Castle, through their Marble Phantasm ability, were given the title of Brunestud and regarded as royalty. This is the reason why the True Ancestors call Arcueid, who is considered the only successful clone of Crimson Moon, the princess of the True Ancestors. There is also the case of the half-breed princess of the Dead Apostles, Altrouge Brunestud, who is the only known case of a child being successfully born between a True Ancestor and a Dead Apostle. 
Altrouge was born from Crimson Moon's machinations in searching out other methods for preparing a body of proper purity for his revival due to no regular True Ancestor coming to possess his level of power. She normally lacks the normal powers of a True Ancestor, and thus cannot use Marble Phantasm to summon the Millennium Castle or move from one place to another by recreating her body, but she is capable of summoning the Crimson Moon.Melty Blood - Night on the Blood Liar route - Block K: 5/Hologram Summer, Lord of Lies That is the reason why she is one of the two possible successors of Crimson Moon and why she has inherited the name of Brunestud, but she is generally considered too "unstable".
==Abilities==
There are different levels of power in the True Ancestor hierarchy, but Arcueid Brunestud (Remake) is a sublimation on the level of the First True Ancestor, she is beyond the other True Ancestors. But all True Ancestors possess power beyond human comprehension from the moment they are born. There are few who can match them in terms of strength, speed and endurance. They are a completely different species from the originally human Dead Apostles, no religion's purification ritual works on them, nor does sunlight faze them — they are beings infinitely close to immortality.
And the bite of a True Ancestor is not only capable of infecting the body with the vector of vampirism, but also the victim's soul. This was the case with Michael Roa Valdamjong (Remake), whose vampire status was transferred through his reincarnations.
===Combat===
They have the normal vampire claws, and very few Conceptual Weapons can harm them. All vampires can ignore damage from most sources as their body will revert to the pre-damaged state rapidly, a Conceptual Weapon such as the Black Keys used by members of the Holy Church nullifies this ability. At night they are almost invulnerable, and their power is at its peak during the full Moon.Tsukihime - Near Side: Arcueid's route - 12/ The World of the Moon
During the night, all of their Lines and Points of Death disappear, rendering them indestructible; however, they show up again when Shiki "kills" the very nature from which Arcueid draws her strength in one of the endings. Even if their entire body is torn apart at a conceptual level, they can re-imagine themselves a new concept from scratch, even though it takes the majority of their power to do so.Tsukihime - Near Side: Arcueid's route - 3/ The Black Beast ITsukihime -A piece of blue glass moon- - Day 4: "Fire and Blood I" 
The True Ancestors also have Mystic Eyes that enable limited control over others, such as the ability to plant suggestions. The color of their eyes changes to gold when they are active, thus revealing them as possessing the Mystic Eyes of Enchantment.
===Marble Phantasm===
The True Ancestors can use Marble Phantasm, which can literally change reality to create any naturally occurring effect. And those who can summon the Millennium Castle Brunestud, the ancestral home of the True Ancestors are counted as their royalty.
===Backup===
The True Ancestors receives backup from the planet as part of the Counter Force. They have the ability to increase their fighting power to one level above those they face while drawing upon it, and it is said to be virtually unlimited.Tsukihime -A piece of blue glass moon- - Midnight Rainbow route - True End - Day 14: "Stone Unyielding" As they receive backup from the planet, it can be said that the limits of their actions are the limits of nature itself. If the planet is thought of as a single organism they are like its white blood cells, regarding the humans who consume nature as an element that must be exterminated.
Within the annals of the Church, records of fighting a True Ancestor are few and far between. They pull their power from the very world itself. In order to defeat them, it means you’d require a Conceptual Weapon capable of defeating the world itself. But of course, no such weapon exists. And so, granting them a death through external factors is impossible.
But it is possible to cut them off from this power by killing the land around them or sealing them off from the world through a powerful Bounded Field that rewrites the world by switching the terrain effect with a different terrain effect or a Reality Marble that overwrites the current world. While their connection to nature can be interrupted by any such barrier, the ability to actually cut them off from the supply depends on what is being used as energy to hold up the barrier because the overwritten world generally has an even more colossal world seeping up from underneath it to return it to normal. The only ones who may be able to cut them off from their energy source completely is an alien deploying a Reality Marble.
===Event Storage===
True Ancestors possess the ability of : it allows them to conceptually and physically store that which is on the surface of the planet, the ability to requisition Textures. The ability is on the level of the Authorities possessed by Divine Spirits. Differing from the Authorities of Divine Spirits that are classified as "skills", Authorities of the planet are classified as a "system".
Arcueid Brunestud, having entered her Lumina form, possesses the capacity to store the entire planet's Texture within a gravitational sphere. 
==References==
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Category:Terminology in Tsukihime
Category:Terminology in Tsukihime Remake
Category:Vampires
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