How Many Holy Grail Wars Had There Really Been?

After the junior exclaimed in shock, she seemed to think of something and calmed down. "No, that's not right. Although the director did say that a ritual called the Holy Grail War had been held in Singularity X, was that really the truth behind Humanity Incineration? Was it really the cause?"

Holmes said, "It was not the cause, but it was still a highly important factor. The Holy Grail War is a grand ritual in which Heroic Spirits are summoned to fight, and the last remaining Magus and Servant obtain the Holy Grail."

"Miss Tohsaka Rin and the two Ritsuka Fujimarus, you should be familiar with this knowledge. Especially you, Miss Tohsaka Rin—you should even have experienced the Holy Grail War of 2004. Going by the timeline, you should have been living in Fuyuki then."

Tohsaka Rin gave a slight nod. "Yes, you are basically correct. The Fifth Holy Grail War was held in Fuyuki City in 2004. However, I am not the Tohsaka Rin from your world, so I did not participate in your world's Holy Grail War."

Come to think of it, where had this world's version of me gone? Had Humanity Incineration erased her?

Holmes froze for a moment. After a brief silence, he said, "Yes. It is enough that you, Miss Rin, can corroborate that such a ritual was indeed held in Japan in 2004. Our world also has related records. I investigated the records of that battle, but no matter what I did, I could not determine its course or outcome."

"All that can be traced back is the information from when the Holy Grail War began, along with the roster of the seven Magi who gathered in pursuit of the Holy Grail..."

Holmes had intended to continue, but he noticed Ritsuka Fujimaru looking as