C817 Inspector Kotomine Kirei

"You can't be blamed for that. Every Heroic Spirit loses their memories of the Holy Grail War upon death, unless they're strong enough to resist the power of the Holy Grail itself," Yang Rui said, shaking his head slightly as he looked at Altolia.

This matter was shrouded in secrecy, as the three great families would never allow the Heroic Spirits to retain their memories of the Holy Grail War