Inwardly, Saber scolded herself; the term that magi used for the most powerful familiars summoned specifically for the Holy Grail War was hardly common knowledge even in her own world. She should have been more cautious... but on the other hand, there was something strangely familiar about the young man and she couldn't help but trust him.

"Servants are summoned to fight for the Holy Grail, seven in each class. We fight each other until only one Master and Servant pair remain, at which point they may claim the Holy Grail."

She paused briefly, fondly remembering the friend who accompanied her as a decoy Master, and she did nothing to hide the subtle, fond smile. "However, I was also tasked with acting as a bodyguard for my Master's wife, Irisviel."