Gracia Hughes is the wife of Lieutenant Colonel Maes Hughes and the mother of their daughter, Elicia Hughes. Her background reveals that she and her husband were a couple even before the devastating Ishval Civil War, and they married shortly after the conflict concluded. She is a woman of notable domestic talent, particularly celebrated for her exceptional cooking and baking skills; her apple pie is so renowned that she later teaches the recipe to Winry Rockbell.

In personality, Gracia is defined by a gentle warmth and an amiable nature, always welcoming guests into her home with kindness. She is a calm and grounding presence, often serving as a quiet anchor to balance her husband's famously over-enthusiastic and eccentric behavior. However, beneath this soft exterior lies a core of remarkable inner strength and resilience. She is observant and composed, capable of showing great fortitude in the face of tragedy. This duality is her most defining trait; she is able to manage her own grief while providing comfort and stability to others.

Gracia plays a supporting but emotionally pivotal role in the story. Her home is a place of respite for the Elric brothers and Winry, whom she treats with maternal care. On one occasion, she encourages a guilt-ridden Edward and Alphonse Elric to continue their journey, demonstrating her selflessness by putting their needs above her own sorrow. Her most significant and tragic involvement in the plot comes after her husband's murder, when the homunculus Envy uses her likeness as a weapon. Envy first takes Gracia's form to catch Maes Hughes off guard, allowing the homunculus to fatally wound him. Later, Envy again transforms into Gracia to psychologically torment Colonel Roy Mustang, cruelly mocking how Hughes fell for such a "cheap trick" using his love for his wife. These acts cement her as an unwilling symbol of the personal cost of the series' central conflict.

Her key relationships are central to her character. Her bond with her husband, Maes, is one of deep, genuine love; he famously carried her photo and boasted about her constantly. After his death, her primary motivation becomes raising their daughter, Elicia, with the same love and joy Maes would have wanted. She also forms an important surrogate family relationship with Winry Rockbell and the Elric brothers, offering them a motherly figure. Her development is subtle but profound, as she transforms from a happy military wife into a strong, grieving widow who endures immense personal loss with quiet dignity. She does not possess any alchemical or combat abilities, but her emotional resilience and capacity for nurturing are presented as strengths of equal value in the narrative.