"So, if it's true that discarding that dream was the right thing to do in the end and that trying to make sure they were protected was wrong then this world is..."
Atalante, Fate/ Apocrypha, Episode 22 - Reunion and Separation.
She dreamed of being alone and he protected her. But one day separated them from each other. They lived not knowing if the other was alive. Will they meet again? What will be their end?