Type-Moon's Oriental Magician

"This courtyard began with a prophecy made five hundred years ago.

This family has endured since a man who lived a thousand years ago, and rose to prominence in a dynasty shrouded in strange tales.

They, heroes and gods from every age, have gathered for a Holy Grail War.

And so the story begins."

"As for who I am?"

"I'm just an insignificant artificial intelligence in that courtyard."