George Russell is the father of the protagonist, Lynn Russell, and her older half-sister, Sarah Russell, holding the noble title of Viscount Marble. As a British aristocrat, he is introduced as a man who has experienced significant personal tragedy, having been widowed twice. His first wife, Frances, was Sarah's mother and died shortly after Sarah's birth; his second wife, Misuzu Midorikawa, who was Japanese and Lynn's mother, died in a car accident while she and Lynn were traveling to England to reunite with him.

In terms of personality, George is consistently portrayed as a kind, gentle, and loving father who deeply cares for the well-being of his daughters. He is, however, also characterized by a certain indecisiveness and passivity, which contributes significantly to the family's difficult circumstances. He is often away from home on lengthy business trips, a necessity born from his poor financial management, which has left him with substantial debts and the family estate, Marble Mansion, used as collateral for bank loans. This financial pressure forces him to work tirelessly, often to the point of endangering his own health.

A central motivation for George throughout the story is his desire to protect his children and provide for them, though his methods are sometimes flawed. His primary struggle involves resisting the immense pressure from his own father, the Duke of Woburn, to enter into a marriage of convenience with the wealthy Baroness Madeleine Waverly. The Duke pressures George to accept this arrangement as a way to solve the family's debt problems, but George refuses, in large part because it would mean sending his younger daughter, Lynn, away. While he is portrayed as a nobleman who is often preoccupied or absent, he is shown to genuinely love and cherish the moments he spends with Lynn and Sarah. In the anime adaptation, his arc leads him to a more assertive stance where he ultimately stands up against his father's demands and rejects a marriage to Madeleine, choosing his daughters over familial duty.

His key relationships define his role in the narrative. With his daughters, he is a loving but often absent figure, and his preoccupation with work is a source of sadness for Lynn and a contributor to Sarah's initial bitterness. His relationship with his own father is strained and adversarial, as the Duke disapproves of George's choices, including his marriage to a Japanese woman, and attempts to control his son's future for the sake of family prestige. George is also the central figure in the plot involving Madeleine, who seeks to marry him for his title and family connections, though he resists her advances and his father's orders.

Throughout the story, George undergoes a notable development, particularly when comparing his portrayal across different adaptations. He begins as a passive, guilt-ridden man, haunted by his failures to protect his wives and be present for his daughters. His journey involves learning to resist external pressure and becoming more assertive for the sake of his family's happiness. A key difference exists between the anime and manga: in the anime, he successfully avoids the marriage to Madeleine and survives, achieving a degree of redemption. In the manga, however, he gives in to the pressure, marries Madeleine, and ultimately dies from a stress-related illness brought on by overwork and emotional strain. His abilities include the education and conduct expected of a nobleman, but his key flaw is poor business sense, which is the root of his financial ruin.