Eighteen-year-old Sophie is the eldest of three sisters, a position she firmly believes prevents her from seeking an exciting fortune. She works diligently as an apprentice trimmer in the family hat shop, avoiding lively town events due to her deep-seated shyness. When a sudden encounter transforms her appearance into that of an elderly woman, she quietly accepts the change and leaves her hometown. Operating under the guise of an old woman, she finds the confidence to speak her mind freely.

A notorious wizard who travels across the Waste in a lopsided, black moving castle. Rumors in the surrounding towns suggest he preys on young women, making him a feared figure in Ingary. Despite his fearsome reputation, he spends hours obsessing over his hair and colorful clothing in the bathroom. He frequently changes his aliases to avoid unwanted attention and royal obligations.

A powerful and malicious magical figure who recently moved back to the Waste. She is fiercely protective of her own interests and punishes anyone she believes stands in her way. She relies heavily on her fire demon's strength and plots to overthrow the royal family of Ingary.

A fire demon permanently bound to the hearth of the moving castle. He powers the castle's movements and maintains its magical doorways to different locations. Despite his intimidating nature as a demon, he frequently complains about his servitude and expresses a desperate desire for freedom.

A fifteen-year-old boy serving as Howl's apprentice in magic. After being orphaned and evicted in Porthaven, he found refuge at the moving castle by bravely sitting on the doorstep until he was allowed inside. He handles many of the mundane transactions for the wizard, selling low-cost spells to local villagers.

Sophie’s beautiful and strong-willed sister. Refusing to accept the limited educational options presented to her by her stepmother, she actively seeks ways to pursue her interest in learning witchcraft. She arranges a secret plan to swap lives, proving her determination to control her own future.

The youngest of the Hatter sisters, originally apprenticed to a witch but preferring a traditional family life. She confidently takes control of her own destiny by using an appearance-shifting spell to work at a bakery, where she hopes to meet a future husband.

Sophie’s stepmother and the biological mother of Martha. Following her husband's death, she makes the strict decision to pull the girls out of school and set them up with apprenticeships to manage the family's debts. She enjoys socializing in town and wearing fine clothes.

An English teacher who works in a parallel world in Wales. She is deeply grieving the disappearance of her fiancé and keeps a cautious distance from Howl's sudden flirtatious advances.

A local witch who takes on an apprentice to teach her magic. She maintains a strict rule in her house against false appearances and values students who genuinely wish to learn the magical arts.

An eighty-six-year-old, highly respected magical tutor who previously instructed some of the greatest wizards in Ingary. She commands absolute authority in a room and takes her role as a moral guide for her former students very seriously.

Howl's disapproving sister who lives in a modern town in Wales. She views her brother as a disgrace due to his lack of a respectable job and his erratic lifestyle, expressing deep frustration with his unannounced visits.

A man suffering from a severe curse that alters his physical form. He struggles heavily with his fragmented memory and serves as a protective figure for Lettie, who sent him to the castle to watch over her sister.

An animated figure with a turnip for a head that hops along the country roads. It frightens Sophie severely upon their multiple encounters, though it follows basic commands when spoken to with authority.

The ruler of Ingary, currently facing severe political tensions with neighboring nations. He urgently requires the services of a clever, unscrupulous wizard to locate his missing brother and manage the kingdom's magical defenses.

The King's former Royal Magician who disappeared after being sent to confront the Witch of the Waste. His disappearance sets much of the kingdom's anxiety into motion, prompting the search efforts that ensnare Howl.

A talented military general and the King's brother. He disappeared in the Waste while searching for the lost Wizard Suliman, leaving the kingdom vulnerable to neighboring threats.