She is basically Saber as a magical girl with a strong lily motif, though not in a literal sense.
As of the release of Fate/Grand Order, she has gotten an official story, where she is Saber during her earlier days, still wielding Caliburn and just beginning to walk the path of a king. She was still an inexperienced knight, looked like an adorable lily, and her eyes brimmed with shining hope. To experience many things, she traveled the land and engaged in many adventures. The people she saved in his time came to call her in past of the Knight Princess, for her brilliance and beauty.
Saber Lily is treated as a separate character from Saber, so do not add the Saber tag if she is by herself. It's only applicable if both characters are together in the image.
