Prologue

This is the story of a homunculus named Y/n, who was created for the Great Holy Grail War. She was built with data of all the servants that could be summoned for the war, as well as the ability to make clones of herself that eat off of her mana. She's one of the most important pieces of black faction, but she is treated like a normal homunculus, a piece they can just get rid of when they think they have no use for her.

Little did she know that her life would change for the better when she was sent to spy on the red faction and gets caught by the Rider of red. Will she find enough courage to betray her creator, or will she continue to be a tool? That is up to her.