Sakura Matou

Sakura Matou (間桐 桜) is one of the three main heroines of Fate/stay night and the Master of Rider in the Fifth Holy Grail War. Sakura is the younger, adopted sister of Shinji Matou and biological sister of Rin Tohsaka. She has a long standing and obvious crush on Shirou Emiya, who sees her as family. After Shirou's confrontation with Shinji, Sakura would often visit Shirou's home to help him with his daily chores.

Background
Born as Sakura Tohsaka, she is the biological sister of Rin Tohsaka and daughter of Tokiomi Tohsaka and Aoi Zenjou. Like most magi, her father chose only one daughter to carry on his family's tradition as he believed raising an additional child would introduce competition. Zouken Matou, an ancient ally of the Tohsaka House, offered to adopt Sakura with the intention of training her as the successor of the Matou's magecraft as his own heir, Shinji, was incapable of sorcery.

As a result of her natural abilities, Zouken sought to use Sakura as one of his future vessels, empowered by the Angra Mainyu. Having to endure the cruel training under Zouken and Byakuya, Sakura became an empty and emotionless shell resigned to her fate. When Kariya Matou, Sakura's adopted uncle and her mother's childhood friend, learned of Zouken's intentions, Kariya attempted to win the Fourth Holy Grail War in hopes of liberating her. Unfortunately, Kariya died in his attempt and Sakura was unable to understand Kariya's motivation for trying to rescue her. His death demoralizes her and she convinces herself that she should not attempt to fight against Zouken.

After gathering the tainted fragments of the shattered grail from that war, Zouken hybridized the collected black ichor with several of his crest worm familiars. He implanted these parasitic worms into Sakura's body, which drain her Mana but feed on her carnal impulses Some time later, Sakura met her new brother Shinji (who was studying abroad at the time of the Fourth Holy Grail War) when he returned to the Matou house. Though he later came to love and accept his new sister, he bullied her. This ended the day Shinji found out that Sakura had become the heir to the Matou family instead of him and he became harsh with her, just like everyone else in the Matou house. Because Sakura was apologetic and expressed pity toward him, Shinji took that as Sakura submitting herself to him since she displayed no emotion. Some time after the death of Byakuya, Shinji began raping her.

Although castigated and humiliated on a daily basis, Sakura maintained her bearings with great stoicism. For the eleven years after her adoption, Sakura grew to resent Zouken for his cruelty, Tokiomi for sending her away, and finally Rin, for never coming to save her. However, she still kept the ribbon Rin gave her. Sakura drew her strength to endure such hardships from Shirou, whom she admired for his dedication. The inspiration she found came from watching him persistently attempt to jump a bar during a track-and-field practice session. She joined the Archery club in order to be closer to Shirou watching him from afar. A year before the events of Fate/stay night, after Shirou was injured in an accident, Sakura gathered enough courage to approach and help him; she has visited him ever since to assist with daily activities.

Personality
While Sakura is outwardly shy, soft-spoken and eager to please, she possesses a great inner strength. As noted by Shirou, she can also be openly stubborn at times. However, she is also prone to feelings of resentment towards others.

Despite the cruelty she endures living with the Matou family, she is given a brief reprieve in Kariya, her adoptive uncle and the only person who genuinely loved her. When he dies in the Fourth Holy Grail War, Sakura mistakes Kariya's last attempt to free her from the Matou house as a warning from Zouken as the fate of those who disobey him. The incident cements Sakura's despair and resignation towards her own suffering. However, her own resolve is strengthened after she falls in love with Shirou Emiya and becomes closer to him by helping him with domestic tasks to express how she cares about him. During Fate/stay-night, she begins to feel isolated when she believes that Shirou is beyond her reach.

When she awakens as Dark Sakura under the influence of Angra Mainyu, her personality changes drastically; she becomes a devilish, evil, and cruel person. Sometimes she talks about herself in the third person.

Development
Her initial concept was based on Fujino Asagami. Upon looking at Sakura Tohsaka depicted in Character material, Gen Urobuchi thought “aah, right now I’m writing about a world that does its best to brutally mistreat this kind of girl.” It was a "huge mental burden" for him, so he decided to torment her even more. While she only appears twice, her "misery index: may actually be the highest in Fate/Zero. In the original draft of the scene of Kariya's death, the plot was "inhumane." Nasu "scolded" him for it, asking him “What color is your blood, anyway!?” It became one of the few scenes he stopped, making Sakura's monologue into a very mild and calm one.

Fate/Zero
"I don't have anyone to call my mom or sister...Grandfather said I should think that they never existed"

- Sakura speaking to Kariya before the Fourth Holy Grail War - Fate/Zero, Episode 1

In Fate/Zero, Sakura is adopted into the Matou family one year before the Fourth Holy Grail War begins. Sakura is described as soft-spoken and often in the shadow of her more energetic sister, and her adoption has deeply affected both Aoi and Rin, who both try not to express their unhappiness openly. Kariya arrives in Fuyuki City three days after her adoption, which he learns from Aoi. Having been a childhood friend of Aoi, he had become well-acquainted with Sakura and her sister, who were both fond of his company.

After confronting Zouken, Kariya makes a deal with Zouken to win the Holy Grail in exchange for Sakura's freedom to return to the Tohsaka family. Kariya was the only member of the Matou family to love Sakura, who became resigned and emotionally withdrawn from the torture she endures from training under Zouken and Kariya's older brother, Byakuya.

Unfortunately, Kariya is defeated during the Fourth Grail War and failed to obtain the Grail. With the last of his strength, Kariya returned to the Matou mansion to return Sakura to Aoi and Rin, but he died in the process. Sakura, who was standing in front of Kariya, interpreted Kariya's actions as a warning to those who defy Zouken and she remained with the Matou family.

At some point after the war, Zouken managed to collect fragments of the destroyed Grail and implanted them into Sakura's body, transforming her into an incomplete lesser Grail.

Fate/stay night
Sakura only plays a minor supporting role in the Fate and UBW route and she only appears as Shirou's friend. She visits Shirou every day and competes with Rin for his affection.

Sakura would not develop as the “Black Grail” in any other route. However, when she was chosen by Shirou, “the person she does not wish to lose”, the negative emotions she kept bottled up all these years came flooding out, which accelerated the growth of “All the World’s Evil – Angra Mainyu”.

In the anime adaption, her role is expanded slightly beyond her appearances in the Fate scenario. After the defeat of Berserker, Sakura is captured by Caster to use as a sacrifice in order to summon the Holy Grail and is held at Mount Enzo, Caster's stronghold. Shirou, Rin, and Saber attempt to rescue Sakura and to stop the Holy Grail from being summoned, during which Shirou and Saber are forced to fight against Souichirou Kuzuki and Assassin respectively. Rin confronts Caster, who manipulates Sakura to fight against Rin. During the fight, Sakura is revealed to be Rin's sister and that she actually comes from the Tohsaka family. In order to save her sister, Sakura allows Rin to stab her so Rin will be able to sever Sakura's magic circuit and prevent Caster's plans from being completed. Following Caster's defeat, Sakura recovers at Shirou's house and ultimately survives the Fifth Holy Grail War.

Heaven's Feel
"No Senpai. I'll probably end up hurting you...I'm going to hurt you, Senpai, but...I want to stay like this."

- Heaven's Feel

Sakura is the principal Master of Rider, who was summoned several days prior to the start of the 5th Holy Grail War. However, under pressure from Shinji and the desire not to fight either Shirou or Rin, Sakura yielded her Master's right to him, although Sakura retains her original Command Mantra. As Rin and Shirou became closer, Sakura began to feel contempt for her sister, which was intensified by her belief that Rin was the cause of all her suffering.

Zouken, disgusted at the ineptitude of Shinji as a Master, begins a genocide against the other Servants with help from True Assassin and Sakura morphed into a premature form of Angra Mainyu, referred to as "the shadow". Berserker, Lancer, Saber, and Archer are all absorbed or terminated by this unholy trinity, and Sakura regurgitates Dark Saber and Dark Berserker as assistants. At night, she goes on a rampage throughout Fuyuki City, ingesting large numbers of innocents for mana. Gilgamesh eventually confronts and impales Sakura's body with several Noble Phantasms from within his Gate of Babylon, but she regenerates at an impossibly fast rate and consumes him as well. She is forced to quickly convert him to mana in haste because she was afraid he might tear her up from the inside if she does not digest him.

Meanwhile, Shirou, who wasn't attracted to Sakura and only saw her as a friend and Shinji's sister, realizes that something is wrong and that Sakura is suffering. Shirou decides to protect her, but he is unsure of his feelings for her. Because of it, Shirou is devastated when he found out that Sakura is one of the participants in the Grail War. He starts doubting about his ideals because he still wants to save everyone, but realizes that if he does so, Sakura might die. Finally, after a talk with Illya and later Archer, Shirou abandons his ideals in order to protect Sakura. With this new ideal in mind, he finds Sakura crying at the park, and believing that she cannot be saved. Shirou consoles her by telling her that he will always protect her and he will fight for her. However Sakura continues having her strange dreams. Recognizing the devastation she has wrought, Sakura seeks out her grandfather to force him into ending her life in order to protect Shirou.

However, along the way Shinji attempts to blackmail her into sex, threatening to tell Shirou of his history of raping her. Horrified at this prospect, Sakura murders Shinji and gives into her internal malice. She then realizes that she is the shadow that appeared in her dreams and becomes Dark Sakura and proceeds to abduct Ilya, hoping to use her as the core for a new Holy Grail. After Shirou and Kotomine rescue Ilya, Dark Sakura stops the supervisor's artificial black heart, giving him only a few hours to live. She also assimilates True Assassin and purges her body of Zouken's worms. She is confronted by Rin in the chamber of the Greater Holy Grail beneath Mount Enzō, her power equally matched by The Jeweled Sword of Zelretch. Rendering Sakura's shadows useless, Rin makes her way to Sakura, but is unable to give the finishing blow due to her love of her sister. Rin embraces Sakura even after Sakura has stabbed her in panic. Realizing Rin's love, Sakura again starts resisting the malice within in her long enough for Shirou to dispel Angra Mainyu's grip on her soul with Rule Breaker.

If Shirou does trace Excalibur and destroy the Grail, his life is extinguished and, which results in Sakura's Normal Ending. Refusing to accept Shirou's death, Sakura continues to live in the Emiya house, forever waiting for Shirou until she later dies of old age. She later reunites with Shirou in what is insinuated to be the afterlife.

If Ilya intervenes, closes the gate, and performs the Heaven's Feel on Shirou to keep him alive and close the Grail once and for all, it results in Sakura's True Ending. After her dark self is destroyed, Sakura's body is left containing vast amounts of mana due to her connection with Akasha. She ends up living with Shirou and Rider, with the servant's existence sustained by Sakura's mana pool.

Fate/stay night Manga
"Nii-san...Senpai...Will we ever be able to go back to those happy times?"

- UBW Manga, Chapter 24

In the manga version of Fate/stay night (which follows the Fate and Unlimited Blade Works scenarios), Sakura is a supporting character. She is trained by Byakuya Matou rather than Zouken (who does not appear in the manga); while Shinji does not rape her, he is still abusive towards her. However, she shows concern for both Shirou and Shinji, wishing for the three of them to be good friends like they used to be before the Grail War. She quietly watches the fight between Saber and Rider from afar and after Shinji is defeated by Saber and Shirou and falls from a building, Sakura uses her last Command Spell to make Rider save his life, revealing to Shinji that she is the Master of Rider. After this, Shinji feels guilty after all he has done to her and apologizes. She is currently taking care of Shinji at the hospital and has not appeared since.

Fate/hollow ataraxia
In Fate/hollow ataraxia, Sakura lives a peaceful life in Fuyuki City, which Rin has left in Sakura's care while she is at the Mage's Association, and Rider comments that Sakura is now the popular new captain of the school archery club. Sakura's dark side still exists, but appears only for comic relief. Shinji reveals to Shirou that Sakura assumed control of the Matou household, and both he and Zouken are terrified of her.

In the eclipse story The backside of Kibisis Rider and Sakura seem to work together to seduce Shirou and engage in a threesome with him. Actually this is all Rider's doing, trying to get Shirou to pursue Sakura more aggressively. Yet in the middle, Shirou realizes the truth and reverses her spell on her, in the end revealing to viewers that Rider herself has deep feelings for Shirou. Sakura appearing in this episode is only a conjecture by Rider's spell, a representation of Rider's true intentions of her actions.

Fate/Unlimited Codes
In Fate/Unlimited Codes, Dark Sakura is a playable character and she is known as the Makiri's Grail (マキリの杯). In her story, her personality becomes twisted and she wants to destroy everything along her path. She has already killed Zouken by the time she encounters Kirei Kotomine. Kirei can tell Dark Sakura is on the verge of collapse and the personality of Sakura Matou is still within Dark Sakura. Although Dark Sakura claims she is broken, Kirei founds the Matou can raise the young well but the training are too harsh which Sakura appears to have no concern of pain. She further explains that Zouken didn't expect her to last long and ironically he didn't last long to die. Kirei pleased with Zouken's death and expects to wait for the Holy Grail to form by removing Sakura's consciousness. Kirei was impressed with Dark Sakura knowledge but Sakura kills him in the battle, she claims that she will complete his plan in his place. Her final opponent is herself, her counterpart has stayed behind in order to help the growth of Avenger and the Great Holy Grail. They both fight to the death because there is no point for having two Sakura and they hate themselves the most. Dark Sakura fused her memories with her counterpart, although she is uncertain who actually died. She finally complete the transformation of becoming the Holy Grail and give birth to "All the World's Evil". In her ending, she desires to get out to the outer world and wants to meet Shirou when she is reborn. However she forgets about Shirou existence and longs to get out to the outer world.

In Kirei's story, Kirei used Sakura in order to learn the meaning of life and was responsible for Dark Sakura transformation. In the opening Dark Sakura approach Kirei in the church. Kirei notices Sakura to be very different to their last meeting and he is pleased that she conceived Avenger. She already devoured both Lancer and Gilgamesh and she desires the life energy that has kept Kirei alive. It appears that Sakura's mind and body is completely contaminated aligned with the "curse". Dark Sakura desires to pay back everyone who made her suffer. Kirei pointed out that although Sakura appears to be a different person but she is pretending in order to protect Sakura Matou as a person. While Kirei escapes, Sakura convinced herself that she can kill him with two of his servants gone. Kirei encounters Shirou, Shirou wants to destroy the Holy Grail in order to stop Avenger in order to save Sakura.

Carnival Phantasm
Despite being one of the heroines in Fate, she has a minor role in Carnival Phantasm, compared to Saber and Rin. However, she has a segment focusing on her, Type-Moon Serial TV Novel Sakura, parodying a soap opera.

Her darker personality is comically exaggerated, such as complimenting herself in her monologues and having her stalk Shirou on his dates with the other heroines, all while showing a mischievous, evil grin and getting there before he does.

Other Appearance
In the Fate/Extra universe, Moon Cell replicated Sakura's data and created a NPC with the same name Sakura Matou who is an Advanced AI in charge of the health of Masters.

Abilities
Sakura was born with great potential and rare natural talent, considered to be a miracle equal to that of Rin. It surpasses the norm of "natural talent" or "inborn skill" possessed by others, and due to that she would be in danger without the protection of a magi house, can be equated to a curse in a way. She was given to the Matou house to act as their heir for this reason, but Zouken did not intend to use her for that purpose. For the purpose of acclimatization, she has to undergo constant torture in the basement of the Matou household. The way they pass on their magecraft is not a study, but constant, lifelong torture due to Zouken's preference. Taught to the body rather than the mind, she is forced through immense pain and stress constantly for her "education." The changes are so extensive as to change her hair color, eye color, and every cell in her body so that they no longer reflect her Tohsaka heritage.

While having greater potential than Kariya or Byakuya, she is more suited to the Tohsaka magecraft. She was born lacking an Elemental Affinity of the "five great elements", and instead had an Imaginary Element of Imaginary Numbers, or "Hollow", as her affinity and Sorcery Trait. This was changed to the water alignment with her acclimation to the Matou magecraft, so she cannot display her true talent. Her Crest Worms will feed on any excess prana she circulates before she can use a spell, leaving her unable to even cast any in most cases. Due to them devouring it on a constant basis, even Rin is unable to tell that her sister is an actively practicing magus.

Without expecting anything from her intelligence, Zouken sought to turn her into a tool that uses magecraft. With such little formal education, she is unused to combat and cannot normally match someone of Rin's caliber, losing ten out of ten times without being able to breach Rin's barrier. Rin compares her to a bird with the potential of flight being placed in water, forced to die or adapt as best it can. While she would have had great success as a Tohsaka magus, her current state is much like that of the untrained Shirou, only worse due to her lack of physical training. Under duress, she can cast a spell using the Matou "absorption" nature magecraft, and it shoots like a spear, stabbing and entangling the part hit to drain the person of energy. She says that it has little practical use compared to something like Reinforcement that has many different uses in that it is limited to "stealing away from others" and feeding on their pain.

Magic Crest
The Magic Crest of the Matou family is in the form of Zouken's Crest Worms, forcefully implanted into her as part of her acclimatization process. They have grown within her for eleven years, turning into a nerve that has entangled throughout her entire body like a Magic Circuit. It is suspended under normal circumstances without have an effect on her body, but it will attack her nerves and use her energy to roam throughout her body while taking even more if it activates. Left for half a day, they will drain her body of energy and consume her flesh as nutrition. As with any Magic Crest, it is painful containing a foreign substance in her body, but even more so with it entangling her nerves with its own and moving about. Compared to the pain experienced in Rin's arm, she compares Sakura to a cluster of Magic Circuits that violates her function as a human being and should overwrite her mind with a wave of energy.

Normally only an observation device for Zouken, its usage can be activated by her lust, which in turn causes her to lust even more as the worms in her blood become an aphrodisiac. It can be forcefully activated with an aphrodisiac given to Shinji or just through her normal feelings for Shirou. As they devour her energy, she becomes more lustful and is forced to seek out supplemental energy, semen in the original story and blood in Realta Nua. Zouken should be able to incite the worms into action as he pleases, making it a priority to stay away from him. As his main body has been changed to a small worm next to her heart, that is actually impossible. As they are so integrated into her nerves and Magic Circuits, it is impossible to remove them normally, even for Zouken. Kirei Kotomine uses a large number of Command Spells to remove most of it, but he cannot remove the ones metabolized with her nerves without removing her heart.

Its original usage is not meant as a means to kill her, but the conditions of the Fifth War provide a unique opportunity. Imposed on her to make sure she participates in some capacity, they will activate if she breaks a "certain condition", abandoning the war as a Master. Entrusting Rider to Shinji falls under the condition, but it will torture her should she refuse to battle while having Rider's contract. Even forcefully removing her contract with a Command Spell would cause her to be instantly consumed. With the added burden of managing Rider's upkeep, it is difficult for her and could lead to it devouring her. It is set to last for the duration of the Holy Grail War, and will spread further with each day. Kirei's surgery is able to reduce her overall pain somewhat, but she is still plagued by the same overall problem.

Black Grail
Sakura has been developed to be able to act as the Black Grail (黒の聖杯), a second Lesser Grail, by Zouken Matou. Though the ritual of the Fourth Holy Grail War ended in failure with the destruction of the Holy Grail, it had briefly been completed. It would normally be painful to have the inorganic substance of the Grail within a human body, so he turned the shards into a living thing to allow her to still function as a human. Combining them into Crest Worms, he placed them into her body. Zouken lacked the skill of the Einzberns and completed an eighth of the process in his own way, so she is in an incomplete state. She has the ability to function like the Einzbern Lesser Grail, Illyasviel von Einzbern, in acting as a container for the souls of the Heroic Spirits and becoming the gate upon the ritual's completion.

Zouken originally has no plans for her to be utilized fully in that state during the Fifth Holy Grail War, but instead as an experiment in acting as "Makiri's Holy Grail" that is able to live as a human and contain the function to collect souls. The purpose of changing her is mostly as a way for eventually reaching his goals, slowly developing her into something like the Holy Grail over several decades. While it would be impossible for her to go into that state in other routes, the conditions within the Heaven's Feel route allow for her to become active. Only when being chosen by Shirou Emiya, the "person she does not wish to lose", do her bottled up negative emotions come to the forefront to accelerate Avenger's growth. Previously thought of as only an unadaptable Holy Grail, she shows surprising growth and talent in being able to retain her senses after eventually taking in a number of Servants. He equates her to a true Holy Grail one the same level as the Einzberns, even though he had thought it impossible.

Servants that come into contact with the shadow from the Grail are greatly affected. They cannot oppose it, rotting them anywhere it touches. They lose feeling in the affected areas as they become that which does not exist in the world. Proper Heroic Spirits are extremely affected, going as far as losing consciousness on contact, while Servants close to it in nature, while not fully affected, well have energy drained from touching it. Those taken in and not digested are blackened, changing their mentality as it is corrupted by its malignant influence and considerably augmenting offensive power.

While she can take in and blacken most Servants, Gilgamesh is unable to be controlled, so she must digest him in haste to keep him from tearing her up from the inside. Converted to prana, he provides enough to accelerate the development of the Grail even without enough Servants. Though he is difficult to digest, the large amount causes her to buckle like a broken dam due to previously being able to only barely maintain herself. Differing when he escaped from the Grail mud in the Fourth Holy Grail War cut off from the main body, that of Sakura, the shadow, is connected to the body of Avenger itself. Servants are unable to resist her, having become the Grail itself, and even being incarnated is not enough as long as one is materialized under the Grail System.

As with the Einzbern Holy Grail, the container cannot retain full human function while taking in souls of Heroic Spirits and receiving the powers of the Holy Grail. Her body loses function as the amount of energy she contains from the souls increases, and the overflow from great swirl of magic of the Holy Grail is too much for her mind to withstand. It causes her to break down until becoming Dark Sakura, first showing an overall loss of feeling in her extremities and the state of recent memories becoming vague.

Black Shadow
With the development of Sakura as the Holy Grail, the Black Shadow (黒い影) begins to manifest around Fuyuki. It is the contents of the Grail, Angra Mainyu, leaking out from the other side when Sakura is unable to properly shut the gate even as a complete Holy Grail. It is a Cursed Boundary Layer, Sakura's shadow or even Sakura herself, normally controlled below her threshold of awareness. While it seems that it works with Zouken, he cannot communicate with it, and he can only arrange its path to keep it from running wild. Though he is able to calm it nightly to keep the damage to a minimum, he eventually becomes unable to handle it as Sakura develops. It devours magical energy at first, only leaving people unconscious. More ruthless in its feeding than Caster, it eats their prana along with their minds. It eventually realizes that eating them fully is more efficient, taking hundreds of people from fifty households in one feeding. Rather than smashing them, it only needs to swallow them, body and soul.

It is an "unidentified object" that gives the impression of a jellyfish on land or a deep sea monster. Its presence dominates all who look upon it, seeming to distort space around it. It lacks eyes, limbs, or a body, but still casts a shadow at its base. It looks insubstantial, as if a shadow were to stand with so light an existence that it looks able to simply be blown away. As the Holy Grail's shadow, it should not normally have form or a will, but passing through the gate, Sakura, it takes her form, borrows her sealed id, and obtains a body to come into the world. It is a Holy Grail with a will, seeking out humans souls to complete itself. It will swallow all it sees, especially clumps of magical energy like Ilya. It should be possible to stop by stopping Sakura, as it is born from her unconsciousness. It hates whoever Sakura hates, so it will keep them from coming near her.

It is impervious to all conventional attacks, and its targets can only await death in its presence. Shirou is unable to tell of the concept of death can even apply to it. As a cluster of curses, its touch is highly corrosive due to containing Angra Mainyu's property of All the World's Evil, dissolving organic matter and converting the base elements into pure prana. It can lash out with tentacles, bring forth a Shadow Giant, and spread out for ten meters to swallow everything like a wave of water, touching them with All the World's Evil that burns skin like coal, cuts off their life, and shows them its horrors. It takes in energy just by existing, turning plant life black, and automatically leeching it from those without any resistance. It can absorb the energy in an area in order to swell up and explode. It tramples over everything upon exploding and spreading the collected energy out like a storm, swallowing its prey instantly.

It can overwhelm all Heroic Spirits no matter their strength so long as they are summoned under the Servant system, filling even the mindless Berserker with the instinct to run away. Spreading its mud over the ground like a swamp, Servants engulfed by it are restrained down by countless tentacles and swallowed. It easily tears through Lancer's Rune barrier, capable of blocking great Noble Phantasms. It dislikes organic material, passing through that which is not alive and digesting that which is alive. Taking them in instantly, the Cursed Boundary Layer is a Bounded Field of dissolution much stronger and more instantaneous than even Blood Fort Andromeda. Growing by the day to feed even more, it swallows an area of fifty meters at once, and then goes on to act as a tidal wave that passes through all things to take its victims without causing a bit of collateral damage. It is not detectable because it is not a specially activated spell, but its regular actions even if it is extremely powerful.

Connected to Sakura, she can initially only feel slight aftereffects from its feedings, but later begins to have uncontrollable visions of it acting. Both its smell and the presence behind it remind Shirou of her, and she feels an intimacy with it, something without an evil mind that, while similar to her, just eats in a different way. She becomes more in-tune with it as the war progresses, eventually coming to the point where she is the one wandering the town at night. It begins to originate from her as her affinity with it develops, feeling its hunger as her own and allowing her to swallow Gilgamesh. It begins to stretch out on its own, allowing her to hear and see through it directly. After becoming Dark Sakura, the Command Spell around her body has the same make-up as the Shadow.

Dark Sakura
After Sakura rejects Zouken's control and regains her central consciousness, she becomes Dark Sakura (黒桜), a rancorous and psychotic distortion of her normal self. It would normally be that she would either have exploded from the strain of being the Grail or have had her consciousness disappear and be overtaken by the shadow. Due to her affinity with it, she is able to take control of it. Touching Angra Mainyu, the mud of the Grail, contaminates a person's personality and reverses it towards the orientation of evil. Her reasoning and emotions are severely impaired, and she is indiscriminately destructive to everything around her. She is one capable of using the power of the mud as part of her own power due to the contamination. As she develops, she becomes a "threat to humanity" that could potentially have required or eventually gotten to the point of needing intervention from the Counter Force. Even with this overwhelming strength, being unused to battle and her unstable mental state makes planning against her possible.

Using souls as a perpetual motion machine to create prana, Rin calls her a poor imitation of the Third Magic. Connected to the "other side" of the Grail, she has a stock of prana that cannot be used in a lifetime, effectively making it infinite. Despite that, she can only use the full capacity of her Magic Circuit to instantaneously release one thousand at a time. Against the Jeweled Sword, Rin is able to release the same amount to match the shadows, making it a battle of Sakura's limitless prana and Rin's infinite prana. With the same properties as the Shadow, she is capable of forming tentacle appendages from her body. She can spontaneously regenerate, allowing her to recover from mortal wounds within minutes of receiving them. Even before fully developing, she survives being impaled by the Gate of Babylon, having everything below her stomach severed, with only severed nerves being the issue the next day. She can support a number of Servants without issue in this state, and Saber can use the energy intensive Excalibur without limit.

After the contract to Avenger is broken at the end of Heaven's Feel, she is still connected to the other side of the Grail. As an after-effect of the contract, she remains a Holy Grail. While Avenger still exists before Shirou destroys the Greater Grail, it could potentially make her its Master again due to the connection. Vast amounts of energy are collected in her body, and she must periodically release it. She is able to use it to keep up Rider's existence even without support from the Grail, and the excess left after that is given to Shirou to help him maintain his body. She learns magecraft from Kirei's successor and Rider, and her abilities as the Holy Grail, even only in part, are a large boon to her life as a magus.

Shadow Giants
The Shadow Giants (影の巨人) are familiars made out of her Hollow element. Under normal circumstances they are extremely small, but when her powers are augmented by Angra Mainyu and the Holy Grail, their size increases vastly and they start acting as a materialized curse. Each composed of roughly one thousand units of prana, they are called a match for the Noble Phantasms of Servants. She can bring them forth without limit, and the amount of energy spent creating them for just a single battle, over one hundred million, is enough to run a department of the Clock Tower for one hundred years.

Carrying the properties of All the World's Evil, fighting them would normally require something to dispel a curse, but a level of energy equal to that making up the shadows can eliminate them. While Rin Tohsaka could not hope to destroy a single one normally, the Jeweled Sword of Zelretch allows her to match Sakura's limited output used to create them and destroy them with her infinite energy provided by the Second Magic.