Tokiomi Tohsaka

Tohsaka Tokiomi is the father of Tōsaka Rin and Matō Sakura, two of the heroines from Fate/stay night. As a member of the Tōsaka family, he entered the Fourth Holy Grail War as the Master of Archer. Emiya Kiritsugu identifies Tokiomi as one of the two most threatening magi involved in the war after assessing all the Masters involved.

History
Tokiomi is an arrogant and manipulative man who strives, as all powerful magi do, to reach Akasha, or the root of all knowledge. He and Kotomine Risei are close acquaintances; through Risei, Tokiomi meets the young Kotomine Kirei, Risei's son, whose command spells have appeared three years prior to the start of the Fourth Holy Grail War. The two men arrange for Kirei to be transferred from the Church into the Magi's Association as Tokiomi's pupil while leaving Kirei uninformed as to the true nature of the marks on his hand. Both Tokiomi and Risei intend to use Kirei to insure Tokiomi will obtain the Grail and that Kirei's role is to provide Tokiomi with additional command spells and another Servant. Like Risei, Tokiomi holds Kirei in high regard in terms of ability and character but has little understanding of how empty the young man feels.

He is married to Zenjou Aoi, the childhood friend of Matou Kariya. As a father, Tokiomi seems to care little for his daughters; he leaves his estate in the hands of Rin, who he intends to be his successor, and allows Matou Zouken to adopt Sakura because Tokiomi does not wish to train a second child as a magus, given that there is a traditional belief that training a second child would introduce competition. His sudden decision to give Sakura away comes as a shock to Aoi, though she does not openly oppose his decision. When Kariya confronts Tokiomi regarding Sakura's adoption, despite being aware of the nature of the Matou family's magecraft and that Rin and Sakura may become enemies as the inheritors of the Tohsaka and Matou families respectively, Tokiomi only declares that he can think of nothing greater than for one daughter to be renown as a legendary victor and her sister to be known as her formidable opponent. Towards the end of the war, during Tokiomi's visit to Rin, his true intention behind adopting away Sakura becomes apparent. Aware that both his daughters possessed exceeding rare sorcery traits: Rin possessed all five elements while Sakura, though lacking all five, possessed only Imaginary Numbers, Tokiomi knew that the daughter he did not train as the Tohsaka successor would be manipulated and used because of her unusual nature. In order for Sakura to fulfil her innate potential to become a powerful mage, Tokiomi wanted Sakura to learn the magecraft of the Matou family so that she would be able to protect herself from others wishing to use her as a result of her lineage.

Tokiomi dies by Kotomine Kirei's hands in the final volume of Fate Zero. Considering him to be a loyal apprentice, Tokiomi gives Kirei an Azoth knife as a parting gift, only for him to be slain by it. This is the same knife that is passed onto his daughter, Rin, and is wielded by Shiro to ironically kill Kirei in the Fate Scenario.

Servant
Summoned with the fossilized skin of the first snake that shed its skin, Tokiomi's servant is the Archer class servant, Gilgamesh, the King of Heroes and the same rogue Servant who appeared in Fate/stay night. He is well known for his Noble Phantasm, Gate of Babylon: King's Treasury.

Much to Tokiomi's displeasure, the arrogant and materialistic Gilgamesh has difficulty acting covertly. In turn, Gilgamesh dislikes his Master, who he considers boring, and is intrigued by Kotomine Kirei's participation in the war. The Servant suggests that to overcome his emptiness, Kirei should determine backgrounds and the motivations of the other Masters and Servants as to why they wish to obtain the Holy Grail.

He dislikes the presence of Saber and Iskander because they were kings like he was before they became heroic spirits.