Emily "Aunt Em" Gale endures a harsh existence on a desolate Kansas farm with her husband, Uncle Henry, and niece Dorothy Gale. Decades of relentless prairie sun and wind have stripped her of youthful vibrancy, leaving her thin, gaunt, and colorless; her once deep blue eyes have faded to sober gray. Rarely smiling or laughing, her spirit is worn down by unyielding labor and isolation.

Her daily life revolves around ceaseless farm chores—washing dishes, watering cabbages, and raising chickens for nearly forty years. The family occupies a small, deteriorated one-room house, its white paint chipped away, furnished sparsely with a wooden table, a few chairs, a rusting stove, beds, and a trapdoor leading to a storm cellar for cyclone protection. Though stern and prioritizing work over play, she harbors deep concern for Dorothy. Initially startled by Dorothy's cheerfulness and struggling to connect, appearing emotionally distant, her underlying affection surfaces dramatically when Dorothy disappears. Upon Dorothy's return from Oz, Aunt Em cries "My darling child!" and covers her in kisses, revealing genuine love and relief.

Financial hardship defines their Kansas life. After a cyclone damages the farm, Aunt Em confesses foreclosure is imminent, prompting their permanent move to the Land of Oz. Princess Ozma provides elegant accommodations and appoints Aunt Em "Royal Mender of the Stockings of the Ruler of Oz" to occupy her industrious nature. Though initially overwhelmed by Oz's extravagance, she adapts, later choosing a modest cottage on the city's outskirts with Uncle Henry. Her pragmatic nature occasionally clashes with Oz's whimsy, like unintentionally offending the talking chicken Billina by discussing chicken consumption.

Across adaptations, her core traits persist with nuances. In one, deeply worried by Dorothy's insistence on Oz being real after the initial cyclone, she seeks medical intervention, including shock therapy, believing it necessary for Dorothy's mental well-being. Another emphasizes her protective defiance, confronting wealthy neighbor Miss Gulch: "Almira Gulch, just because you own half the county doesn't mean you have the power to run the rest of us! For twenty-three years, I've been dying to tell you what I thought of you!" Theatrical descriptions cement her as a "typical, hard-working farmer’s wife" balancing firmness with warmth.

Her relationship with Dorothy remains central. While literary sources note Uncle Henry bonding more readily with Dorothy during travels, Aunt Em's steadfast presence provides foundational stability. Dorothy's unwavering desire to return to "Aunt Em" underscores this deep familial bond, a recurring motivator throughout her journeys.