He responded to a call from the collective will of the Earth, Gaia, over four thousand years ago, and made a deal to allow for him to live on the Earth in exchange for protection against human corruption. The planet, unable to use a mirror to reflect itself, is unable to set its own standards, so only another celestial body is able to understand the death of a celestial body. True Ancestors based in his image were created as a natural protective system for the Earth, and were set to return it to its natural state. Brunestud traveled the planet, challenged random beings to defeat him, such as Gransurg Blackmore, who was nothing but an average magus, and the villagers holding Merem Solomon. He also gathered a number of followers, such as Blackmore and Trhvmn Ortenrosse, in an attempt to eventually take the Earth as his own kingdom.
He was eventually defeated by Kischur Zelretch Schweinorg wielding Second Magic. He tried to pull the moon to collide with Earth but it was pushed back by Zelretch's magic, so it was unable to affect the planet. With all of his power, Brunestud did not foresee being defeated by a human, but lost to Zelretch due to being too late in understanding the power of Magic, "a rule outside of the rules." Before his defeat, he sucked Zelretch's blood converting him into a vampire.
Brunestud foresaw that his own life was reaching its end due to having too many enemies, as he has a "world corrosive will" that does not abide by either Gaia or Alaya. He desperately wished to have a vessel that abides by the standards of the world, and planned to use the True Ancestors in preparation for his extermination. They are considered to be spirits of nature accepted by Gaia, and even though they are considered the enemies of humanity, the subconsciousness of humans both accepts and denies them as keepers of nature, causing them not to be marked as targets of elimination for the Beasts of Alaya. Normally they were only created by the planet out of necessity, but Brunestud decided to teach them how to make their own kind themselves in order to speed up the creation of a proper vessel. He sought various other possibilities when an heir in the form a True Ancestor could not be born, such as the creation of Altrouge Brunestud, a being born between a Dead Apostle and a True Ancestor. While he was destroyed by Zelretch before the creation of a perfect vessel could be realized, he still has a method for revival. His Reality Marble has been left behind to spawn the True Ancestors, allowing them to inherit a "seed" on which he can imbed himself. Its purpose is so that when a True Ancestor reaches the same purity as him and body of his scale, the Reality Marble allow him to take over their bodies through spiritual possession. Michael Roa Valdamjong considers this to be an inefficient method compared to his own means of resurrection, as it is hard for a being on such a scale to be brought into existence.
Altrouge and Arcueid Brunestud, who have both inherited the Brunestud name, are considered to be those closest to reaching the point of being suitable vessels. Arcueid, created naturally by the True Ancestors, a method which Brunestud had given up on at the time, is considered a perfect body especially close in purity as she can summon the Millennium Castle through her Marble Phantasm ability. Altrouge still lacks the right amount of power and she is considered too unstable, though her control over Primate Murder can give her the right to be called a greater monster more powerful than Brunestud himself in a way. While the True Ancestors were his "children" based on him, only he can be considered perfect, while all of them are considered failures. This is the cause of their blood-lust, their corruption upon feasting on humans, and their connection to the moon. Each has a piece of Crimson Moon inside them and a place to accept him, which manifests in Arcueid as a type of alternate personality hiding inside of her consciousness waiting to fuse with its host. It takes the form of Arcueid's initial state before having her hair removed, and it is able to move around the Millennium Castle while she sleeps. It also stays active in her unconsciousness, such as when Shiki Tohno connects to her dreams in Kagetsu Tohya.
It is unable to fuse with her while she sleeps in the castle, as she is not currently in a state to accept him, and admits to Roa that, while identifying itself as Crimson Moon, it is still nothing more than an aspect of it. Every True Ancestor is an incarnation of Crimson Moon, but at the same time, they are totally different beings. The part inside Arcueid is nothing more than a shadow of her that only exists as a hologram that has possibility. It is not yet confirmed as "Crimson Moon", as it cannot become "Crimson Moon" while "Arcueid Brunestud" is still identified as "Arcueid Brunestud." It realizes it itself didn't know exactly where it stood, and states "And to think I was planning to take over." While it wishes for Roa to unbind Arcueid's chains, he speculates that as long as Arcueid is bound in her own chains, that she will eventually give up her name. This personality speaks to Shiki briefly, amazed that humans are such noisy creatures, and that Arcueid can get along with such an "impolite person." It tries to insist that it is separate from Arcueid, that it is only an aspect of her that is separate from her at the same time. Shiki identifies that while it has long hair and speaks with an accent, and even as just an aspect of her, that it still is Arcueid. It is amazed by those words, as someone who would see Crimson Moon as an enemy who will take Arcueid's body is still using words that affirm its existence. Accepting the enemy means that Crimson Moon is near, to which Shiki replies that he will simply take her back by force. While "fighting with Arcueid to save Arcueid" can be considered a contradiction, he states that he will fight it, and save the Arcueid who has been bound by her own chains. It responds to him with "I hope your words will come to be more than just a simple joke" in a tone that seems like an awkward request betraying her noble self.
The equivalent of the Crimson Moon appears in Melty Blood Actress Again as Archetype:Earth, the alternate action ideology hiding inside of Arcueid's consciousness, who takes the appearance of Arcueid's initial state before having her hair removed. She declares that she came to experience the human world for the first time. She shows a great level of power to the point that Riesbyfe Stridberg calls her "the Ultimate One" and Shiki Ryougi recognizes an overwhelming aura flowing from her and can't see her death. Ciel believes that Arcueid managed to awaken her Origin, but Archetype:Earth denies this declaring that they are intrinsically a single being, and that she simply has a very long waking period, as the basis of life for her is far too vast compared to the living organisms that live on the surface.
He holds a Reality Marble, part of which contains the Millennium Castle Brunestud, the Noble Color of Rainbow, the ability to use a skill called Alt Nagel (アルトネーゲル, Ancient Nail?), which is described as an immensely destructive pillar of wind which stretches as far as the heavens, and a Knight Arm called Real of the World (リアル・オブ・ザ・ワールド, Riaru obu za Wārudo?), which is also the title of the True Ancestors's purpose of restoring the world to its natural state.
All creatures known as Dead Apostles are descended from him in some way, and as with True Ancestors, he can create strong Dead Apostles by drinking the blood of a human, having created at least two members of The Twenty-seven Dead Apostle Ancestors, Merem and Zelretch, and having had both Blackmore and Ortenrosse become vampires through magical research in order to follow him. Despite the impact the Twenty-seven Ancestors have on the planet, they can be considered nothing more than a footprint that he made on the world.
He was able to create a mirror image of the moon and dropped it towards the planet in an event known as the Moon Fall (月落とし, Tsuki Otoshi?). Zelretch was forced to use a virtually limitless Ether Cannon to push it back.
Kagetsu Tohya - 27 Dead Apostle Ancestors Series, ３／Brunestud of the Crimson Moon
The Ultimate One.
 Melty Blood Act Cadenza PS2 Manual - Dictionary: Crimson Moon [Term], p.060
Crimson Moon [Term]
Another name for the organism that was used as the template for the True Ancestors. Also known as the Crimson Moon Brunestud.
After he vanished, individuals close to him in power started being honored with the title of Brunestud.
However, in the long history of the True Ancestors, only two have ever received the name.
 Tsukihime Dokuhon PlusPeriod - TSUKIHIME Dictionary: Brunestud [Term], p.188
Despite being Arcueid's last name, strictly speaking it is actually more like a title. It is possessed by all of the members of True Ancestor royalty.
The Millennium Castle Brunestud where Arcueid had sealed herself away is not her original creation, but was actually created in the past by the most powerful True Ancestor, using marble phantasm. That original lord of Castle Brunestud died long ago, but ever since those True Ancestors capable of forming the castle have been uplifted as royalty. This is why the True Ancestors, who have no concept of hierarchy, nevertheless call Arcueid their princess.
After being tricked by Roa and killing most of the True Ancestors, Arcueid crucified herself on the throne of the castle she materialized herself. A thousand chains stretched from the castle's outer walls to the throne, so that she may seal herself away forever.
In Melty Blood, the Tatari Arcueid materialized the Millennium Castle. Later, in Re-act, it also appeared in her Arc Drive.
Currently, there are only two bloodsuckers with the name of Brunestud: Arcueid and Altrouge.
- ↑ Kagetsu Tohya - Crimson Moon
(Summary) Nasu explaining Crimson Moon's role in Notes.
 Notes - Demonic Sword [knight arms]
The name of the weapon that Knights carry.
All human species born in this world are effected by Gin. Babies born with a large amount of Gin in them shape it as if it's their bones during their lives, and when they reach adulthood, it is laid outside their body. Because it is created with the unanalyzed entity Gin, it is able to cause various effects and its power is strong enough to be considered a weapon.
Only few humans can shape the Demonic Swords, and those who carry a Demonic Sword powerful enough to be used for war are considered as Knights. Only one Demonic Sword exists per Knight.
 TYPE-MOON Fes. Official Pamphlet 10th Anniversary Q & A Booklet:
Q: You must tell us the details of the battle between the Crimson Moon and Zelretch at his prime!
Q: You must tell us the details of the battle between the Crimson Moon and Zelretch at his prime!!
A: You are asking me to divulge such delicious details from my stash of ideas? Mmmm... I have shown some similar scenes in Mahoyo, they would carry a similar vibe. It would be something like, the Crimson Moon dropping a mirror image of the Moon (HERE IT COMES!) versus Zelretch doing something only he was able to do: a virtually limitless Ether Cannon unleashed through a special magic circle ("Magic Square"). If we had five times the budget of Mahoyo, then we may be able to realize such a scene.
|Shiki Tohno • Arcueid Brunestud • Ciel • Akiha Tohno • Hisui • Kohaku • Len • Michael Roa Valdamjong|
|Arihiko Inui • Aoko Aozaki • Barthomeloi Lorelei • Crimson Moon • Gransurg Blackmore • Kouma Kishima • Merem Solomon • Mr. Dawn • Narbareck • Nanako • Noel • Nrvnqsr Chaos • Satsuki Yumizuka • Shiki Nanaya • SHIKI Tohno|
|Akemi Yamase • Akira Seo • Brainwashing-Detective • Caubac Alcatraz • Curry de Marche • Forte • Fake Shiki • Hanei Misawa • Ichiko Inui • Keiko Arima • Kiri Nanaya • Magical Amber • Maiko Yamase • Makihisa Tohno • Master Panda • Mecha-Shiki • Neco-Arc Bubbles • Neco-Arc Destiny • Neco-Arc Evolution • Phantas-Moon • Sougen Jinan • Souka Tsukihime •|
|Melty Blood characters|
|Miyako Arima • Dust of Osiris • Mech-Hisui • Neco-Arc • Neco-Arc Chaos • Night of Wallachia • Riesbyfe Stridberg • Shiki Ryougi • Sion Eltnam Atlasia • White Len|
|Ado Edem • Aristoteles • (Type Mercury • Type Venus • Type Moon) • Gun God • Humans • Land of Steel|