Winry Rockbell, a childhood friend of Edward and Alphonse Elric, grows up in Resembool under her grandmother Pinako Rockbell’s care after her parents—surgeons Yuriy and Sarah Rockbell—die in the Ishval Civil War. Their loss fuels her abandonment struggles and fierce loyalty to the Elrics, whom she considers family. Trained early in automail mechanics, she becomes Edward’s dedicated engineer, crafting and maintaining his prosthetics following his failed human transmutation. Her technical brilliance earns acclaim as a prodigy, leading her to apprentice under Garfiel in Rush Valley to refine her craft.

Her personality blends cheerfulness, empathy, and a resolute moral code, tempered by impulsive outbursts and emotional intensity. She often clashes with Edward’s stubbornness, venting frustration over his recklessness with his automail, yet remains unwavering in her concern for both brothers. With Alphonse, she fiercely defends his humanity against those who reduce him to his armored body, advocating for his emotional struggles.

A pivotal trial arises when she confronts Scar, her parents’ killer. Though vengeance initially consumes her, she chooses mercy, honoring her parents’ legacy as healers by rejecting violence. This decision marks her transition from grief-driven rage to principled compassion.

Beyond the Elrics, she bonds with the Hughes family, supporting Elicia and Gracia after Maes’ death. Partnering with Scieszka, she aids investigations into military corruption, demonstrating courage and strategic cunning. Her surgical expertise, inherited from her parents, proves critical in crises—such as assisting childbirth—while her emotional insight helps mediate the Elrics’ conflicts. By the story’s end, her bond with Edward deepens into mutual romantic devotion, rooted in shared history and reliance.