In the film Howl's Moving Castle, Honey is a minor character who serves as the stepmother to the protagonist, Sophie, and her younger sister, Lettie. She is the owner and operator of the family hat shop in the town of Market Chipping, a business she inherited after the death of her husband. Her name in the original source novel is Fanny Hatter.

Honey presents a somewhat contradictory personality, appearing at once fashionable and frivolous yet fundamentally caring. She takes great care to keep up with the newest fashions from the royal capital of Kingsbury, and her own hats are notably patriotic, such as one decorated with small toy cannons. This focus on appearance and admiration creates a clear contrast with her stepdaughter Sophie, who is naturally more modest and reserved. Despite this superficial vanity, Honey does possess genuine concern for her family. She is visibly worried and emotional when she discovers that Sophie has become a cleaning woman in the wizard Howl's mysterious moving castle, a reaction that shows her deep-seated care for a daughter who is not her own flesh and blood.

Honey's role in the story is propelled by a combination of family loyalty and external coercion. She is forced into a difficult position by the royal court's powerful sorceress, Madame Suliman. To ensure she will never see her husband again, Suliman compels Honey to smuggle a magical spying device, often described as a black worm or peeping bug, into Howl's castle. This act of betrayal is not born from malice but from a desperate situation, as she is torn between her love for her family and the threat to her spouse. When she visits Sophie under the pretense of a happy family reunion—insisting that they all live together—she carries out her mission by planting the device inside the castle. Her internal conflict is made clear by the evident guilt she feels afterward, particularly during her carriage ride away from the castle, where she regrets being used as a pawn in Suliman's schemes.

Her key relationship is, of course, with Sophie. Their reunion is a poignant moment; Honey insists that Sophie return to a normal life, but Sophie refuses, stating she is happy with her new circumstances. In this encounter, Honey's character shows a hint of development. While she initially appears as a somewhat shallow figure focused on propriety and fashion, her forced participation in Suliman's plot reveals a more vulnerable and morally conflicted side. She is not a villain but an ordinary person caught in extraordinary circumstances. Regarding notable abilities, Honey does not possess magical powers or unique skills. Her most defining and unusual trait in the film is that she owns a steam-powered car, complete with a personal chauffeur, marking her as a person of some means and an interest in modern conveniences.