Medmel is the daughter of Leilia and the Prince of Mezarte, born into the royal family as a result of the kingdom's attempt to introduce Iorph longevity into its bloodline. She is half-Iorph, yet she does not display any of the physical traits of that race, instead taking entirely after her father with long orange hair and green eyes. She lives her entire childhood confined within the royal castle of Mezarte, raised by a handmaiden and kept isolated from the world beyond its walls. From the moment of her birth, she is separated from her mother and is never permitted to see her; any questions she asks about Leilia are met with firm denial. She rarely sees her father either, and grows up largely ignored by the royal family, who view her as a disappointment because she shows no signs of Iorph longevity. As a result, Medmel is a lonely princess who remains unaware of the true nature of her heritage and the woman who gave birth to her, living in quiet isolation with little understanding of her own history.

Her role in the story is primarily symbolic, representing the tragic consequences of the Mezarte kingdom's greed for immortality. She is a physical embodiment of Leilia's captivity and suffering, the child for whom Leilia yearns but cannot reach. Medmel herself does not pursue any active goals in the narrative; her function is to serve as an emotional anchor for Leilia's arc. The only notable ability or trait attributed to her is that she lacks the distinctive Iorph appearance and longevity, which marks her as a "failed" experiment in the eyes of the kingdom and leads to her being cast aside. Her key relationship is with Leilia, though it exists almost entirely in absence until the very end of the film. During the invasion of Mezarte, Medmel and Leilia briefly meet face to face for the first and last time before Leilia departs, leaving Medmel behind to begin a new life outside the castle walls. This brief reunion is the culmination of Leilia's long-held desire to see her daughter, and Medmel's reaction in that moment is one of quiet recognition. Afterward, Medmel is left to lead a life freed from the confines of the castle, though what that future holds is not explored. Her development is minimal, as she remains a passive figure throughout the story, but her presence is essential to the film's exploration of motherhood, separation, and the pain of what is lost when political ambition breaks a family apart.