Y/n, the adopted, little sister of Kirie Kotomine. She became broken at a young age after having witnessed the death of her real parents, and then having her adopted father die during the 4th Holy War. The small girl then witnesses her brother become a different man, blaming Gilgamesh for the change. Ten years later, during the next Holy Grail War, she meets Lancer and Archer, two men she becomes close to. She slowly starts to open up to more than her best friend, Rin, and finds herself falling for the three heroic spirits. What will happen as she becomes closer to them? Will they break her walls even more?