Fanny is a physically fragile and deeply shy girl who possesses a steady moral compass and an observant nature. She struggles to feel accepted among her wealthy relatives, often facing cold treatment from her aunt Mrs. Norris. Fanny relies on her education and her strong sense of ethics to guide her through the confusing social dynamics of the estate.

Sir Thomas is the wealthy patriarch of Mansfield Park and the owner of a sugar plantation in Antigua. He is a strict, traditional figure who values domestic tranquility and societal order above all else. Though he provides for his extended family, he maintains a formal distance from his children, inspiring fear rather than openness. His extended trip to the Caribbean leaves his estate vulnerable to modern, disruptive influences.

Lady Bertram is Sir Thomas's wife and the aunt of Fanny Price. Having married into significant wealth, she lives a life of extreme comfort and absolute idleness. She spends her days resting on the sofa, petting her pug, and entirely delegating the responsibilities of raising her children to her sister, Mrs. Norris.

Mrs. Norris is the widow of the former parish clergyman and the busybody sister of Lady Bertram. She is notoriously miserly and regularly flatters Sir Thomas while asserting authority over the Mansfield Park household. She actively spoils her nieces Maria and Julia while missing no opportunity to remind Fanny of her inferior social status.

Edmund is the serious and thoughtful younger son of Sir Thomas, studying to become a clergyman. He is the only relative who notices Fanny's initial distress at Mansfield Park, stepping in to act as her gentle tutor and closest friend. His reliable moral judgment falters when he becomes infatuated with their new neighbor, Mary Crawford, whose worldly views directly conflict with his chosen profession.

Henry is a wealthy, charismatic landowner who prefers the fast-paced energy of London to his country estate in Norfolk. He thrives on romantic games, making a sport of flirting with engaged women before deciding to direct his relentless charm at the virtuous Fanny Price. He is a skilled actor, both on the amateur stage and in his daily interactions.

Mary is the witty, restless sister of Henry Crawford who finds country life entirely boring compared to London society. She is a talented harpist and a keen observer of human nature, using her charm to win over the inhabitants of Mansfield Park. She develops a strong attraction to Edmund Bertram but repeatedly expresses disdain for his intention to join the clergy, hoping to persuade him toward a more glamorous career.

Tom is the eldest son of Sir Thomas and the heir to Mansfield Park. He is a reckless and hedonistic young man who views his wealth purely as a means for personal enjoyment. His extensive gambling debts force his father to lease out the church living originally intended for his younger brother.

Maria is the eldest daughter of Sir Thomas and the favorite niece of Mrs. Norris. Raised to value superficial accomplishments and wealth, she becomes engaged to the exceptionally rich but entirely unintelligent Mr. Rushworth. Despite her engagement, she eagerly encourages the flirtatious attentions of Henry Crawford, enjoying the thrill of his company.

Julia is the younger daughter of the Bertram family, sharing her sister's vanity and superficial education. She initially competes with Maria for the affections of Henry Crawford, reacting with intense jealousy when he favors her engaged sister. She eventually turns her attention to her brother's theater-loving friend, Mr. Yates.

Mr. Rushworth is a wealthy but exceedingly dull young man engaged to Maria Bertram. He is deeply proud of his large estate, Sotherton, and enthusiastically plans to modernize the grounds. He struggles to command his fiancée's respect and becomes increasingly jealous of Henry Crawford's smooth interruptions.

Dr. Grant is the local clergyman who moves into the parsonage after the death of Mr. Norris. He is a lazy, bad-tempered man with a strong appetite for rich food, showing little interest in his parishioners outside of mandatory Sunday services.

Mrs. Grant is the welcoming wife of Dr. Grant and the older half-sister to Henry and Mary Crawford. She happily invites her siblings to stay at the parsonage, hoping the country air will cure them of their cynical London attitudes and perhaps lead to advantageous local marriages.

Mr. Price is Fanny's father, a former Navy Lieutenant living in a chaotic, cramped household in Portsmouth. He struggles with alcoholism and poor health, failing to provide an adequate income for his large family or offer any meaningful guidance to his children.

Frances Price is Fanny's mother and the sister of Lady Bertram and Mrs. Norris. Having married for love rather than money, she lives a life of constant financial stress and domestic disorder, struggling to manage her unruly children and inadequate servants.

William is Fanny's beloved older brother and a hardworking officer in the Navy. He is the only family member Fanny actively misses when she moves to Mansfield Park, and his occasional visits provide her with immense joy and comfort. His naval career becomes a point of leverage for Henry Crawford.

Susan is Fanny's younger sister who still lives in the loud, disorganized Portsmouth home. She has a spirited personality and a genuine desire to improve herself, eagerly soaking up the books and guidance Fanny offers her.

Mr. Yates is a wealthy, theater-loving friend of Tom Bertram from London. He arrives at Mansfield Park full of enthusiasm for amateur theatricals, introducing the idea of staging a provocative play in Sir Thomas's absence to the delight of the younger generation.