Claire is a 27-year-old former combat nurse attempting to reconnect with her husband after years of wartime separation. Strong-willed and pragmatic, her medical training gives her a clinical composure when faced with trauma. After accidentally traveling back in time to 1743, she uses her botanical and nursing knowledge to survive in the Scottish Highlands. Her independence frequently clashes with the patriarchal norms of the 18th century.

Jamie is a 23-year-old, fiery-haired Scottish warrior living as an outlaw. Educated and chivalrous, he possesses a strong sense of honor and loyalty to his family and clan. He bears terrible scars on his back from a brutal flogging by the English army, shaping his deep hatred for Jonathan Randall. Despite his youth and outlaw status, he commands respect through his physical capability and natural leadership.

Captain Jonathan "Black Jack" Randall is a ruthless English officer commanding the garrison at Fort William. He bears an uncanny physical resemblance to his 20th-century descendant, Frank, but possesses a deeply sadistic and calculating nature. He uses his military authority to inflict pain and terror on the Scottish populace. He derives particular pleasure from breaking his prisoners both physically and mentally.

Dougal is the war chieftain of the MacKenzie clan and the brawn behind his brother Colum's leadership. He is a formidable, battle-hardened fighter deeply committed to the Jacobite cause of restoring a Scottish monarch. Cunning and politically ambitious, he routinely assesses others for their usefulness to his goals. He exhibits a volatile mix of rough charm, predatory behavior, and fierce loyalty to his homeland.

Colum is the sharp-minded Laird of the MacKenzie clan. He suffers from Toulouse-Lautrec syndrome, a degenerative disease that has bowed his legs and causes constant pain. Unable to lead his men into battle, he relies on his intellect and political maneuvering to maintain power. He is a careful, observant ruler who prioritizes the survival and stability of his clan above all else.

Frank is a 20th-century historian and former intelligence officer in World War II. He is intellectual, measured, and deeply fascinated by his genealogy, spending his vacation researching his 18th-century ancestors. He loves his wife but struggles to bridge the emotional distance that grew between them during the war.

Murtagh is a wiry, dour-faced Scottish clansman fiercely devoted to the Fraser family. He speaks little, preferring to let his actions and weapons communicate for him. Beneath his gruff, untamed exterior lies a steadfast protector who observes much more than he lets on.

Geillis is the mysterious, sharp-tongued wife of the local fiscal in Cranesmuir. She possesses extensive knowledge of herbs, poisons, and local folklore, openly leaning into the village's rumors that she practices witchcraft. She is politically radical, highly observant, and operates with motives that are hidden from the rest of the community.

Jenny is Jamie's strong-willed, capable older sister who runs the family estate of Lallybroch in his absence. She shares Jamie's striking physical features and his stubborn temperament. Having survived the brutal occupation of her home by English soldiers, she is fiercely protective of her family and land.

Ian is a steady, eventempered Scottish farmer and Jamie's closest childhood friend. He lost a leg while fighting alongside Jamie in France but remains an active and vital part of running the Lallybroch estate. He serves as a calming presence within the volatile Fraser family dynamic.

Hamish is the young son of Colum and Letitia MacKenzie. Boisterous and energetic, he is the undisputed heir to the MacKenzie clan. He bears a striking physical resemblance to his uncle Dougal, a fact that goes largely unspoken within the castle walls.

Laoghaire is a beautiful sixteen-year-old girl living at Castle Leoch. She possesses a romantic, immature view of the world and is deeply infatuated with Jamie. Her youth hides a vindictive streak when her desires are thwarted.

Ned is the elderly, educated solicitor for the MacKenzie clan. Originally from Edinburgh, he abandoned a quiet city practice for the rougher, more adventurous life in the Highlands. He uses his legal expertise to manage Colum's affairs and maintain order during rent collections.

Arthur is the wealthy, older fiscal (magistrate) of Cranesmuir. He holds considerable local authority but has little control over his young, enigmatic wife. He is a practical man who turns a blind eye to the stranger elements of his household.

Mrs. Fitz is the formidable, highly capable head housekeeper at Castle Leoch. She manages the massive castle's daily operations with an iron will and a warm heart. She is one of the few people at Leoch who possesses genuine medical knowledge besides Claire.

Reverend Wakefield is a kindly, intellectual Scottish vicar with a passion for history. He maintains an extensive library and assists Frank in tracking down 18th-century military records. He is a devoted adoptive father who values genealogical history.

Mrs. Graham is Reverend Wakefield's sensible, intuitive housekeeper. She possesses a deep belief in Highland folklore, pagan rituals, and divination. She offers Claire unsettlingly accurate predictions about her future.

Roger is the young adopted son of Reverend Wakefield. He is a quiet, observant boy with deep roots in the local community, learning about his extensive Scottish lineage through the vicar's careful tutelage.

Letitia is the wife of Laird Colum MacKenzie. She is a practical, observant woman who understands the delicate political balances required to maintain her husband's leadership and secure her son's future.

Alec is the Master of Horse at Castle Leoch. He is a gruff, experienced horseman who trains the estate's mounts and oversees the stable hands. He acts as a blunt but well-meaning mentor to Jamie.

Hugh is an information gatherer who wanders the Scottish countryside. Having had his tongue cut out while held captive by Turks at sea, he communicates through gestures and tokens. He is an invaluable ally to outlaws and rebels.

Sir Marcus is a gruff, bear-like Scottish landowner living near Wentworth. He harbors a long-standing romantic attachment to the memory of Ellen MacKenzie, making him sympathetic to her family members when they face dire trouble.

Father Anselm is a visiting Franciscan monk at the Abbey of Ste. Anne de Beaupré. He is a gentle, scholarly man translating ancient texts. He provides spiritual counsel without judgment.

Rabbie is a scruffy, underfed young boy living near the Lallybroch estate. He suffers severe beatings from his drunken father until he is taken in to work in the Fraser stables, where he finally finds safety and regular meals.

Ronald is a bitter, abusive tenant farmer on the Lallybroch lands. He regularly beats his son Rabbie until Jamie physically coerces him into relinquishing control of the boy.