Sakura Matou is the sister of Shinji Matou. After Shirou's father Kiritsugu died, Sakura often visited Shirou's home to help him with his daily chores. She is outwardly shy and timid, but possesses great inner strength. Sakura has a long standing and obvious crush on Emiya Shirou.
Born as Tohsaka Sakura, Sakura is the biological sister of Tohsaka Rin, and has been in the care of the Matou family for many years. Like most sorcerers, her father, Tohsaka Tokiomi only chose one daughter to carry on his family's tradition believing that raising an additional child would introduce competition. Matou Zouken , an ancient ally of the Tohsaka House, offered to adopt Sakura, for his own heir, Matou Shinji, was incapable of sorcery.
Under Matou care, Sakura is subjugated to physical and mental abuse on a daily basis. Zouken seeks to use her as one of his future vessels, empowered by the power of Angra Mainyu. Gathering the tainted fragments of the shattered grail from the last war, Zouken hybridizes the collected black ichor with several of his worm familiars. He implants these parasitic worms into Sakura's body; they drain her Mana but feed on her carnal impulses, drastically increasing her sexual frustration. To curb this aggravation, Zouken frequently instructs Shinji to rape Sakura. Jealous of Sakura usurping his birthright as heir of the Matou House, Shinji continues to brutally rape her of his own volition. Sakura's plum hair and eye color are direct consequences of Zouken's worms swimming through her bloodstream.
They first met 4 years ago when Shinji , Shirou's friend introduced her as his little sister. Later Shirou got injured and Sakura volunteered to visit him and to take care of the house chores. Even after his injury was healed she always managed to find an occasion to come to his house. She has an obvious crush on Shirou, but perhaps he's the only one who doesn't notice
it. She and Fuji-Nee are like a family to Shirou now. His brother, Shinji often abuses her, sometimes even physically. That was the main reason of Shirou and Shinji's later alienation.
Sakura only plays a minor supporting role in Fate and Unlimited Blade Works routes, but takes the role of the main heroine in Heaven's Feel. She's the original Master of Rider , but she was unwilling to fight in the Grail War. Hence Shinji took control of Rider by the use of the Book of False Attendant. Her past also slowly comes to light.
In her own route Zouken is dsigusted by Shinji's ineptude and mobilises his own plan. Sakura stays at Shirou's house and their relationship starts to become stronger. Meanwhile mysterious shadow attacks and defeats the Servants one by one. Assassin is the first victim from which's body Zouken succeeds to use as a cathalyst for True Assassin. Sakura starts to have fevers and bad dreams. Meanwhile they confront Zouken and believe to be defeated him. But Zouken recovers and manages to trap both Shirou and Saber. With the clever cooperation of True Assassin and the Shadow, Saber has been defeated and Shirou was only saved by Rider's sudden appearance.
Later after a confusing scene at the school it's been revealed that Zouken planted a crest worm inside Sakura to consume her unless she keeps fighting as a Master. Her situation worsens at an accelerated speed, but with Kirei's operation her life is saved for the time being. Meanwhile the mysterious shadow consumes more and more innocent people.Although castigated and humiliated on a daily basis, Sakura maintains her bearings with great stoicism.
Rin is adamant on killing Sakura to prevent her to hurt more people, but Shirou after a though decision decides to protect her. After that Sakura returns to Shirou's house. The Shadow starts to become stronger and Sakura slowly realises her connection with it. After Rin lost Archer she comes to Shirou's house and offers cooperation again. Sakura is starts to be jealus of Rin and Shirou's growing relationship.
After a while Sakura finally realises that she herself is the Shadow and wants to face with Zouken to settle things once and for all. But she moves according to Zouken's plot and forced to kill Shinji. She finally breaks and gives way to her desires and become Dark Sakura.
Sakura rampages openly. Summoning Shadow Giants rivalling the Servants in power each and the use of Dark Saber, Saber's corrupted form she manages to defeat Berserker.
In the day before the last one, she warns Shirou and Rin of the danger of awakening Angra Mainyou and asks them to flee. Instead they plan their own way to save her. Meanwhile Sakura breaks free of the control of Zouken and defeats him. Shirou and Rin arrives and Shirou with the help of Rider takes on Dark Saber while Rin confronts Dark Sakura. With the use of Jewelled Sword of Zelterch she's able to match her, but in the end unable to kill her despite how many times she tried to convince herself.
Meanwhile Shirou defeats and kills Dark Saber and meets Sakura. She frees him of Angra Mainyou's control with the use of Rule Breaker. Then he tries to destroy the Great Grail, the thing which is about to give birth to Angra Mainyou, all evils of the world. Depending on the player's choice he either dies and Sakura's waiting for his return until she dies or survives and manage to live a happy life with Sakura after that.
Even After her contract with Angra mainyou is severed she still has the connection with the Souls absorbed by the Grail. She particularly still has unlimited magic supply. Shirou and Sakura still have some problems to outcome, including repenting for their sins, but they probably have a bright future ahead.
She fell in love with Emiya Shirou several years ago after secretly watching him constantly attempt to jump a bar (as a track-and-field practice). His staying dedication inspires Sakura to endure her hardships, and her admiration gave her the confidence to approach and assist Shirou after he receives an injury. Shirou's growing relationship with Rin is a source of hatred and envy for Sakura, for she believes Rin to be the cause of all her torture. For the eleven years after her adoption, Sakura grew to resent Zouken for his cruelty, her father for sending her away, and finally Rin, who was unaware of her sister's suffering, for never coming to save her.
Being born under the Tohsaka family, Sakura has tremendous magical potential despite her lack of formal training and limited mana supply thanks to Zouken's worms. She possesses the magical ability called Imaginary Numbers which allows her to cause great harm to spiritual beings with her magic, particularly Heroic Spirits.
When she becomes Dark Sakura due to Angra Mainyu's corruption, she has an unlimited supply of mana at her disposal due to being linked to the Holy Grail. However, she is limited by her magic circuits in how much mana she can release at once. Making use of Imaginary Numbers, Sakura is capable of turning both human and spirit into pure mana by absorbing the base elements of their form after being corroded by her touch. She also possesses highly regenerative abilities as she recovered nearly instantly after being impaled from several Noble Phantasms coming from Gilgamesh's Gate of Babylon.
Dark Sakura is capable of summoning and controlling shadows in differing forms. Her own shadow can form tentacles around her that can be used to absorb the mana and life force of its victims and/or suck them into her personal dimension. A normal human struck by them will suffer from severe burns and loss of one's mind. The shadow is also capable of corrupting Servants to the point where they fall under her control, their minds become warped and their abilities are greatly augmented. This power is great enough where it could even overwhelm Saber's high magic resistance. Dark Sakura can also create shadow familiars that have strength on par with a Servant and are each made out of about 1000 units of prana, the same amount as Saber in her weakened state with Shiro as her Master.
Because of the Grail's influence, Dark Sakura also gained the ability to use Heaven's Feel, one of the five "true magics" in Nasuverse that grants one the ability to control souls to such an extent that death can not cause them to disperse and they are no longer linked to neither the physical world nor Akasha. This allows her to either absorb souls for use in an "eternal generator" to aid in Angra Mainyu's resurrection on Earth or to manipulate them as she sees fit.
Fate/Stay Night: Unlimited Blade Works
An alternate retelling of Fate/Stay Night based off of the original visual novel's scenario by the same name. It primarily focuses on Shirou, Archer, and ...