The tertiary protagonist of the film besides the two Elric brothers. She comes from a family of alchemists from Creta, a fictional country on the western border of Amestris, and uses a form of alchemy the Elric brothers are unfamiliar with, allowing her to heal injuries. She was taken in as a child by the residents of Milos, a slum located at the bottom of the trench separating Amestris and Creta, and occupied by Cretan survivors of the skirmish between countries. Her parents were branded as traitors of her country and killed and her brother, Ashley, disappearing.
As a member of Milos's resistance against the Amestrian-occupied Table City, she believes the only way to achieve victory is by harnessing the power of the Philosopher's Stone, which she uses to protect Milos from Atlas, a villain posing as her missing brother, and later from her own power-mad brother himself. She uses the rest of the stone's power to save her brother from death by opening the Gate of Truth at the cost of her left leg.