Irisviel believed that an eight month old existence outweighed the thousand year dream of the Einzberns, so she sealed Illya's faculties, knowledge, and memories in order to allow her to live as a normal girl. She had been continually tuned during her first few months of life, given the ability to understand words and different types of knowledge. Her parents, Kiritsugu Emiya and Irisviel von Einzbern, decided to abandon the ritual by Irisviel's choice, but Illya still had the knowledge granted to her to act out her purpose. Illya was born to act as the key of the Holy Grail War system of Fuyuki, but it was never actualized in the Fate/kaleid liner world.
