"Impossible," Tohsaka denied.
"Think about what happened when the last war ended?"
"The Fuyuki City fire," Tohsaka answered.
"The winner of the previous war, Kiritsugu, saw through the Holy Grail's true nature and ordered Saber to destroy it. However, his actions released negative emotions, which caused that fire."
Tohsaka could not accept this fact right away. She paced back and forth, thinking over the news.
"Who would contaminate the Holy Grail?"
"If you think carefully, you should be able to guess the answer."
After a moment of thought, Tohsaka asked, "One of the Three Families?" Three families were responsible for organizing the Holy Grail War, so they were the most likely to have contaminated it in secret.
"More precisely, the Einzbern Family," Ian added. "They formed a contract with Angra Mainyu. Of course, they weren't the only reason."
"Angra Mainyu? The being known as the incarnation of 'all the world's evils'? Why would they do that?"
"They were obsessed with the Third Magic and believed this choice would help."
"Watch your words, girl."
"Sorry. Wait, why am I apologizing? You're not my father."
"Then you should show me more respect."
"Whatever." She decided not to swear in front of him anymore, but she would never admit it.
"You said they weren't the only cause of the contamination. Who else was involved?"
"Now isn't the time to learn about that."
"You! Are you trying to force me to use a Command Spell?"
"Listen to me." Ian looked straight at her, his tone calm but authoritative. "Some truths must be learned at the right time. Don't act like a child throwing a tantrum because she didn't get what she wanted."
The contamination of the Holy Grail involved a father figure in Tohsaka's life. Once she learned the truth, it would be difficult