Sialim Eltnam Re-Atlasia created the homunculus known as Rani VIII with the intention to see if it was possible for not just alchemists but for humanity to continue existing in the cyber world, which would mean having to give up their physical bodies.
Rani the Eighth signifies “the eighth woman.” She is different from the homunculus created through DNA engineering that are popular on the black market. Rani’s design is based on old world Magus theory, and she was made with cutting edge science and technology developed by the Atlas Institute. She was made as a Magus so she could be sent to the cyber world. In short she is nothing short of being a new form of mankind. By using nano-sized fibers called Etherlite, Rani can directly send herself into to the cyber world without any direct physical connection. Her computational power is equivalent to the power required to generate all of the Holy Grail War's arena and schools. She can go head to head with the High Level AI who are in charge of managing the Holy Grail War.
Rani is a young girl who appears to be of Indian descent with wavy light purple hair with part of it tied into a ponytail. She has purple eyes, a tan complexion, wears glasses and has a bindi on her fore head as worn in India. She wears a purple fable collar with a dark purple gem in the center. Under that she wears a white shirt with a deep V, leaving a portion of her chest bare, and black tight shorts. Over that, she wears a white lab coat with the emblem of Tsukumihara Academy on it. On her hands are multiple golden bracelets and small thin white gloves. On her legs she wears long white and purple socks and black shoes. She seems to be from southern part of India due to her complexion.
In Fate/Extra CCC, Rani is seen wearing the alternate navy sailors uniforms she wears black tights with her normal bracelets and wears black shoes.
She considers her height to be average height for a girl and her weight to be rather thin. Her three sizes are optimized for activity and portability. She wears no underwear because she considers wearing them are forbidden.
Rani is an intelligent, calm, polite, yet emotionless young girl. She doesn't seem to follow any will of her own, and instead refers herself as a tool of her professor.
Her servant is Berserker. Like most of his class, he has barely any personality left, although he does seem to follow her orders without question and willingly protects Rani during the battle with Rin, even giving her a "gentle smile" before being destroyed if you choose to save her. If he weren't summoned as a Berserker, he had the qualifications to be any other class besides Caster.
As noted, during the game, a crisis will occur and the player is given the choice of coming to the aid of either Rani or Rin Tohsaka. While both will survive regardless, if you choose to save Rani, her Berserker will sacrifice itself and she will become their ally during the latter stages of the Holy Grail War. After recovering from the shock of being deprived of what she saw as her one purpose for existing, she comes to support and care for the main character.
If the player sides against her, she survives Lancer's Gáe Bolg attack. She hands over a Knifeshape pendant to help identify Hakuno, the knife absorbs residual magical energy while doing so, it puts phemenal amount of stress to the brain. The feedback would normally be enough to kill someone if a magic circuit was not present. This confirms Rani's suspicion about Hakuno existence as a self-aware NPC. They will also end up fighting Run Ru and her Lancer in the fourth round as a result. They must fight her and Berserker in the sixth round of the Holy Grail War. After her defeat, she slightly smiles showing signs of sadness and says goodbye to Hakuno.
In the manga adaption, both Rani and Rin survived and they both help support Hakuno. However, it is later revealed that her Berserker survived. In Chapter 26, Rani and her Servant later attack Hakuno and Saber, but they defeat her. The scene that later plays out after is similar to that of the game when she is defeated. In Chapter 28, a grave was made for her and both Rin and Saber pay their respects.
In the backstory of Fate/Extella, Rani was defeated in the 6th-7th round.
She is an Atlas Alchemist, Rani claims that she possesses the knowledge of the Atlas Alchemist but it pales compared to her professor. She is also skilled in Astrology that surpass even Caster, she uses her Astrology to help Hakuno learn more about Archer's identity.
She can create the Vorpal Blade with her alchemy but she requires a Malachite as the catalyst to recreate the blade. The Vorpal Blade has an effect on types of monstrosity such as the Jabberwock. Even with her skills, the blade would shatter when it is used and she can only transmute it once.
At her core is Hermes, which is a 6th generation spiritron computer that shouldn’t even be completed and exist in this world yet. She has a self-destruct mode called "Helm to the Northern sky: Mode Osiris", it is a last resort move in the case of her mission failure. It was intended to destroy the Moon Cell. Her body was design to have her Magic Circuits overload and her Etherlite heart would explode causing meltdown to the arena and causing shockwaves of data corruptions.
- gain_con(128); - A Codecast that strengthens her Servant's defense.
- gain_mgi(128); - A Codecast that raises her Servant's magic.
In the Fate/Extra Manga, Rani had the ability to observe others remotely from mirrored surfaces, such as the water in a fountain.
- In the Type-Moon's 10th Anniversary Character Poll, Rani was ranked 160th.
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8
 Fate/EXTRA material - Character Profile: Rani VIII, p.064
- Height: 157cm
- Weight: 45kg
- Blood type: A
- Birthday: 1st January
- Image colour: Purple
- Talents: High-speed thinking, Division thinking
- Likes: Astronomy
- Dislike: Gambling
- Enemy: Gatou
- Height: 157cm
- ↑ 2.0 2.1 2.2 2.3 2.4
 Fate/Extra CCC - Rani VIII Secret Garden [T] Information
NAME Rani VIII “It is a name my professor gave me.”
HEIGHT 157cm “A quite average height for a girl.”
WEIGHT 45kg “It could be called rather thin, but I have no health problems.”
3SIZE B80/W58/H81 “These sizes were also decided by my professor. They are optimized for activity and portability.”
HOME The Atlas Institute “I was trained at the Atlas Institute.”
BIRTHDAY January 1st “Perfect. An incredibly beautiful start.”
WEAK POINT Armpits, back, abdomen, etc. “Please avoid touching these, they are sensitive points on the human body. They’re very tender.”
FETISHISM I have no perverted tastes. “I am a proper homunculus. For my functionality to possess any special eroticism would be unthinkable.”
◆What do you look for in a partner?
- A warm, generous heart, perhaps “Directed only at me. I would like to be told ‘I will walk alongside you.'”
◆What’s your favorite color of underwear?
- Are you seriously asking that? “I will say it however many times necessary. Underwear – is – forbidden.”
◆How do you spend your free time?
- There is no such thing as free time. “Though I may make plans for ‘fun time’ for engaging in hobbies. What?”
WEAK POINT わき、背中、腹部など
- A warm, generous heart, perhaps “Directed only at me. I would like to be told ‘I will walk alongside you.'”
 Fate/EXTRA material - Encyclopedia: Sialim Eltnam Re-Atlasia [Person's name], p.184
Sialim Eltnam Re-Atlasia [Person's name]
Rani's teacher. The last alchemist and the one who created Rani. After sending Rani to the moon, she succumbed to disease.
As an Atlasian alchemist she was devoted only to her own research, but in the end as a human being, she made Rani and fell into eternal slumber.
Why she ordered Rani to go to the moon was to see whether it was possible for not just alchemists but for humanity to continue existing in the cyber world, which would mean having to give up their physical bodies.
Unlike other magi, the Atlasian alchemists do not have the objective of evolving into a higher state of existence. The top priority of Atlas is to avoid the future of destruction. Essentially, this means that it's okay for humanity to change or decline as a species if it means surviving, and she stuck to that thinking.
As one manifestation of that side of her, she also left Rani with the cold order of incinerating the Moon Cell along with herself if it proved to be a monster that couldn't be controlled.
In EXTRA, Rani might have referred to her as a gheh, but, sorry, just forget that happened.
Also, there might have been something about Sialim having a twin elder sister who died at birth.
- ↑ 4.0 4.1 4.2 Fate/EXTRA material - Encyclopedia: Rani VIII
 Fate/EXTRA material - Encyclopedia: Leonardo B. Harwey
Leonardo Bistario Harway.
Strongest Master who participated in the Holy Grail War.
Ever-victorious king whose every parameter is maxed out.
(By the way, though Rin is superior in terms of offensive codecasts
and Rani in terms of pure computational ability,
even if Rin and Rani challenge Leo together, he still has the higher chance of victory)
Though it’s unimaginable from his youth and mild demeanor, he is the next successor of the rulers of the world, the Harways.
A king in the making who is the result of inborn talent (including Magic Circuits) polished off by the Harways' harsh yet careful education.
Leo himself is more aware than anyone that he was desired as a ruler and raised to be a ruler.
A king is not someone who comes from the human world,
but one who is sent by the heavens to the earth.
Those who are born thus are said to possess regality.
Leo’s regality is “thorough ideal.”
One can say he is a lord of a level unattainable by the average person; someone who has overcome the contradiction of having discarded human feelings while full of humaneness, for the purpose of realizing a totalitarian society where people of unequal skills can live in equality.
Though he has had no freedom since birth, that he nevertheless has a calm personality is no doubt his innate nature.
If we say the protagonist represents change, offense,
then Leo is the character representing stagnation, defense.
Leo possesses no self-interest and wishes for the world to stabilize under the watch of the Harways.
His goal in seeking the grail is not “greater power” but “certain stability.”
If the Holy Grail ends up in the hands of someone other than himself, the conflict that would have otherwise concluded in ten years would extend to twenty years.
…...Even if a Master sent by the conglomerate emerges victorious, so long as the Holy Grail is “power on the national scale attained by an individual,” it will become the kindling of conflict.
In order to prevent that future, he himself went to the moon as a Master.
“Humanity will only exhaust itself even if it continues to change with no answer in mind. To find a new path for change before the world completely stagnates will doubtless be my next task.”
So Leo narrates.
That “the current regime of the conglomerate is mistaken”.......Tohsaka Rin’s contention was a problem that Leo had already long since pondered over.
To put it this way, the one who prepares for the doom that comes after in view of the answer of this path is Leo.
Meanwhile, the one who fights in attempt to change that answer is Rin.
To Leo, what should be prioritized is humanity’s continuation, not the reign of the Harways.
His ultimate goal in seeking the grail is a millenium of the next generation where people can live in safety.
However―――Leo, who knows neither the negative emotions of the weak, of humans, nor defeat, at the same time does not know the emotion of fear, and is unable to even imagine the possibility of defeat.
He will eventually come to know how distorted that is for a “human being.”
His way of accepting everything the way they are could not, even in his final moments, summon up the intrinsic essence of life―――the vitality in the face of adversity.
A Master who also appears in CCC.
Like Rin and Rani, he fell into the Far Side upon the conclusion of the fifth week.
Though his memories were sealed, even BB was unable to brainwash him, and he was trapped in the old school building. (simply not being able to go out)
Even knowing that his memories are sealed away,
“I mean, it is a once-in-a-lifetime opportunity and all, so let us simply carry on like this!”
he responds optimistically.
Although upon being defeated by the protagonist in Extra he learns the truth that “he is not perfect,” thereby truly becoming a king, he is fated to perish in that very instant.
In the Far Side, the boy king who had been unable to even converse with the protagonist due to the difference in values, enjoyed his brief experience of youth.
By the way, the only ones to whom Leo does not address with honorifics are AIs and artificial lives of human make. His attitude towards Sakura and Rani can be taken as cold, but Leo is interacting with them in full earnest, with acknowledgement of their identities.