George Russell, Viscount Marble, is the father of Sarah and Lynn Russell. His first wife, Frances Russell, died soon after Sarah's birth. Years later, during a business trip to Japan, George met and married Misuzu Midorikawa; they had Lynn together. Misuzu died in a car accident protecting Lynn, prompting George to bring Lynn to England to live at Marble Mansion.

Burdened by significant debts, George placed Marble Mansion as collateral with the bank. He works extensively to repay the debts and reclaim the family home, often neglecting his health. His father, the Duke of Woburn, pressures him to marry the wealthy Baroness Magdalene Waverly to resolve the financial crisis. George refuses because the arrangement would require sending Lynn back to Japan, demonstrating his commitment to keeping his family together.

George deeply loves both daughters, though his demanding work frequently keeps him away. The manga depicts his absence bordering on neglect, contributing to Sarah's bitterness, while the anime portrays him as more involved, attending Sarah's ceremonies and organizing vacations. After the bank repossesses Marble Mansion due to unpaid debts, Sarah moves in with the Duke of Woburn and Lynn with Countess Isabel Montgomery. George continues striving to reclaim their home, though his efforts leave him physically depleted.

His character arc diverges between media. In the manga, pressured into marrying Magdalene Waverly, George dies. The anime adaptation changes this outcome: he avoids the marriage entirely, survives, and focuses solely on restoring the family's stability through tireless work. Across both versions, he remains motivated by loyalty to his daughters, prioritizing their well-being over social expectations or financial solutions.