Claire is a time-traveling English doctor from the 20th century who has chosen to live in the 18th century with her husband. Operating as the primary healer on Fraser's Ridge, she relies on her modern medical knowledge, which sometimes causes the locals to view her with suspicion. She is fiercely pragmatic and bound by her medical oath, pushing her to treat even those she despises.

A Catholic Scottish Highlander, Jamie operates as the leader and patriarch of the Fraser's Ridge settlement. He handles rising political tensions by taking a role as an Indian agent and militia leader, all while carrying the burden of knowing the Revolutionary War is approaching. Though he frequently resorts to physical force to protect his family, he balances this with strong principles and leadership skills.

Claire and Jamie's tall, red-haired daughter, who traveled back from the 20th century. She applies her modern engineering mindset to frontier life, working to build inventions like indoor plumbing and pottery kilns. She balances these projects with her responsibilities as a mother while carrying the psychological weight of a past assault.

Brianna's time-traveling, Protestant Scottish husband. He feels a strong calling to become a minister to serve the diverse, often struggling community at Fraser's Ridge. He uses his historical knowledge and education to mediate disputes, though his focus on helping community widows occasionally causes tension in his marriage.

Jamie and Claire's nephew, who spent significant time living with the Mohawk tribe. He bears facial tattoos and blends his Catholic upbringing with Native spiritual beliefs. He carries deep emotional scars from a lost family with the Mohawk and travels the woods constantly with his faithful wolf-dog, Rollo.

A notorious Irish pirate, smuggler, and human trafficker. His past brutalization of Brianna casts a long shadow over the MacKenzie family, and his continued interest in her child poses a severe threat to their peace.

Jamie's deceased nemesis, a former British military officer. Though he is dead, his legacy of sadistic torture and sexual violence continues to haunt Jamie's psyche, appearing in visions during moments of extreme stress.

The head of the Committee of Safety in Brownsville. He uses his newfound position to harass citizens, consolidate local power, and act as a vigilante force, quickly establishing himself as a significant threat to Jamie's authority.

Richard Brown's brother and a corrupt member of the local Committee of Safety. He is heavily involved with the dangerous element of marauders terrorizing the backcountry and acts with brutal disregard for others.

A Protestant Scottish Highlander who knew Jamie during their imprisonment in Ardsmuir. As an educated but rigidly religious man, he acts as a scribe and schoolteacher on the Ridge. His severe beliefs cause him to view Claire's medical texts as witchcraft, though he begrudgingly accepts her surgical help for his ailing hand.

Tom Christie's bright, observant teenage daughter. She demonstrates a strong fascination with Claire's medical book and practices. Pushing against her father's strict religious boundaries, she begins to apprentice under Claire, learning about herbs, anatomy, and surgical procedures.

The boisterous young son of Brianna and Roger. He spends his days playing on the Ridge, unaware of the deep anxieties his family harbors regarding his true parentage and his safety in a dangerous era.

An older Scottish man and former archer living on Fraser's Ridge. He bears a hand injury from past clan conflicts and assists Jamie with community tasks, often running errands and managing logistics for the settlement.

Arch Bug's wife and the housekeeper for the Frasers. She is fiercely protective of the household, often meddlesome in family affairs, and deeply involved in the daily operations and defense of the Big House.

A mysterious man traveling with a group of dangerous marauders. He reveals himself to be a time-traveler from 1968 who arrived in the past intending to help Native Americans, but now finds himself desperate to return to his own time.

A wealthy British aristocrat and former governor who maintains a close, complex friendship with Jamie. He attempts to navigate the dangerous political divide between Loyalists and rebels, frequently sending intelligence and gifts to the Frasers.

A former British soldier who was branded on the face after a riot in Boston. Sent by Lord John Grey to receive medical treatment from Claire, he struggles with physical ailments like hookworm and tries to find a peaceful life away from city violence.

An officer in His Majesty's Army who works to secure Loyalist support in the backcountry. He pressures Jamie to head a Committee of Safety and act as an Indian Agent, firmly believing in British authority over the colonies.

A young woman living on Fraser's Ridge who suffers from chronic malaria. Her romantic prospects become a major topic of local gossip, as multiple suitors vie for her affection while she relies on the community for medical support.

A young hunter living on the Ridge with his twin brother. He takes it upon himself to act as a watchman against bandits and harbors a deep, protective affection for Lizzie.

Josiah's nearly deaf twin brother. He communicates closely with his sibling and shares his duties in hunting, working the land, and protecting Lizzie Wemyss.

A French-born man raised in a brothel who views Jamie as a father figure. Missing one hand, he struggles with feelings of inadequacy and depression, especially when facing the harsh societal prejudices of the colonial era regarding his family.

Fergus's young, frequently pregnant wife. She operates the community distillery and attempts to maintain peace in her growing family while dealing with the physical and emotional challenges of frontier life.