Saber Lily is a younger version of Artoria Pendragon, representing her girlhood before fully accepting her royal destiny. She captures a critical juncture in character growth, characterized by bright hope shining in her eyes and relatively immature ways of handling situations. Unlike her adult counterpart who wields Excalibur, Lily uses Caliburn, a transitional and unfinished version of the holy sword that symbolizes her incomplete journey to kingship. This version serves as an official visualization of prequel stories, hinting at unrefined qualities suitable for future rulership through her youthful appearance. Lily's form is essential for understanding Artoria's entire growth trajectory, showcasing the contrast between her appearance and the weight of royal responsibilities she will eventually bear.