Rin Tōsaka
Fate/Stay Night character
Game screenshot of Rin Tōsaka
Voiced by	Kana Ueda (japanese) Mela Lee (english)
Profile
Date of birth	February 4
Nationality	Japanese
Occupation	High school student/magus
Title	Master of Archer, heir to the Tōsaka clan
Known relatives	Sakura Matō (sister), Aoi Tōsaka (mother), Tokiomi Tōsaka (father : deceased)
Other Self	Kaleido-Ruby (when using the Kaleidostick)
Abilities	Affinity with jewel thaumaturgy and use of the Second Magic

History

Two centuries ago, the Tōsaka House, in collaboration with the estates of Makiri and Einzbern, helped found the Fuyuki Holy Grail Wars. The land of Fuyuki City, which possessed the second greatest spiritual power in all Japan, was owned by Rin's ancestor, Nagato Tōsaka; at the behest of the Einzberns, he provided his property as battleground for present and future wars. Nagato was a kirishitan, as well as a pupil of Zelretch; these titles gave him considerable influence on both the Mage's Association and the Church, allowing the Tōsaka's to participate in the Holy Grail Wars, free from harassment by either organization.

Rin was reared as the successor to her family's magecraft, and was instructed by her father, Tokiomi Tōsaka, to prioritize sorcery over her own interests. Ten years ago, Tokiomi was selected as a Master in the 4th Holy Grail War, and Rin was entrusted to take care of the Tōsaka estate until his return. After her father was killed, Rin continued to perfect her sorcery, with some guidance from her guardian, Kirei Kotomine. To divert attention from her private life, Rin has diligently strived to earn the admiration of her peers, even though she is secretly stingy, tomboyish, and a slacker.

Although Rin resents the sacrifices she has endured for the sake of tradition, she is fiercely competitive and eager to prove herself as a skilled and capable sorcerer. She was immensely disappointed at summoning Archer and ended up in a quarrel with him; however, the duo soon reconciled their differences and quickly got along.

Abilities

Rin, throwing her jewels

As the Tōsaka’s successor, Rin excels in transformation of energy, which includes storage of Mana in objects. Because the amount of energy a magus can release at one time is restricted by bodily limitations, Rin has been able to accumulate all of the Mana generated by her body during her lifetime through jewel crystallization. As with practicing of sorcery, charging these jewels has become a daily process for her. When Rin's stored power is needed, she can detonate her jewels on contact with an object, resulting in a release of energy equivalent to an attack rank of "A".

Her most common offensive spell is a Finnish technique known as Gand, which concentrates Mana into Rin's forefinger, resulting in a hazy black orb subsequently fired like a bullet. Originally intended to a curse, Rin's variation on Gand takes on an unusual, corporeal form. Additionally, Rin has bypassed any need for a verbal component to initiate this spell, and she can fire many Gand shots in an instant.

Rin is also proficient with reinforcement sorcery; although not her specialty, she begins Fate/stay night with far more skill than Shirō Emiya has in the discipline. This spell is employed only once, when Rin uses reinforcement on her legs in the Fate/stay night prologue in an attempt to give herself enough speed to distance herself from Lancer. This displays her talent in the field, as the application of reinforcement to enhance parts of a living being is considered the pinnacle of difficulty.

Role

Rin narrates the prologue of Fate/stay night, detailing her first three days involved in the 5th Holy Grail War. In her dialogues, she reveals to her Servant Archer that she is only participating in the war out of her own competitive desire to become the winner. She also expresses dissatisfaction with Archer, for she was attempting to summon a Saber-class Servant, though she quickly grows accustomed to him.

After scouting out Fuyuki City, Rin is caught off-guard at Homurabara Gakuen by Lancer, who then engages in battle with Archer. This fight is interrupted, however, when Shirō Emiya is discovered and fatally wounded by Lancer; Rin, who has sympathy for Shirō, uses her family's treasured pendant, which possessed a strong concentration of Mana, to repair his heart. After she returns home, she realizes Lancer will continue to hunt Shirō when he realizes Shirō is not dead, prompting her to sprint toward Shirō's neighborhood. It is here that she first encounters Saber, and the three Fate/stay night scenarios branch off.

By the conclusion of the prologue, Rin would have used two Command Mantra on Archer; the first is to force him into submission after he acts insubordinate to her briefly after he is summoned, and the second is to force him into ethereal form before he is killed by Saber. In all scenarios, her position as narrator is replaced by Shirō.

In Fate, Rin acts as an advisor to Shirō, dutifully attempting to school him in traditional sorcery in light of his powerful Servant, Saber. Although Shirō's recklessness results in the death of Archer, she bears Shirō no ill-will, though she hides bitterness at her loss of both her Servant and her chance at winning the war. Rin is later stabbed by Kirei Kotomine in Shirō's home, though she survives and ultimately leaves for London at the war's end to become a true magus.

Rin is the heroine in Unlimited Blade Works, and has a romantic relationship with Shirō. In Heaven's Feel, she uses the Jeweled Sword Zelretch to fight Sakura Matō.

Rin and Shirō become partners in every scenario. In fact, Rin does care for Shirō. However, aside from her heroine scenario, UBW, she ends the 5th Grail War the romantic interest of Shirō. In Fate scenario, she becomes only an observer of Shirō's life and continues her friendship with Shirō after Saber's departure. In Heaven's Feel, she does not pursue her feelings further because of Sakura Matō, her biological sister, who is in love with Shirō. Some believe that her interaction with Saber in one scene in the Fate scenario implies that Rin is bisexual, but girls having crushes on other girls is, while not common, nothing that raises eyebrows in Japanese culture.