Background[]
The Einzbern, one of three families of sorcerers involved in the Holy Grail War (the others being the Tohsaka and the Makiri/Matou), were responsible for creation of the vessel which the souls of the defeated Servants would go into, while the Makiri created the system of Masters and Servants and the Tohsaka supplied the land which became Fuyuki City. As such, Illya was prepared by her family to act as a living vessel for the Grail.
Love: 17,385