Claire is a medical professional from the 20th century who traveled through time to live with her husband in the 18th century. She acts as the primary healer at Fraser's Ridge, utilizing a 1977 medical manual alongside traditional remedies. Her experiences across different centuries give her a pragmatic view of the impending Revolutionary War. She works diligently to protect her non-traditional family from the violence surrounding them.

Jamie is a Scottish warrior and landowner who manages the diverse tenants of Fraser's Ridge. He holds traditional views of duty and protection but actively respects the independence of the women in his family. He deals with deep political divisions among his neighbors as the Revolutionary War arrives at his doorstep. He forms a partisan militia to protect his land and the people residing there.

Brianna is Claire and Jamie's daughter, raised in the future before traveling back in time. She balances her modern knowledge and skills, such as engineering and portrait artistry, with the harsh realities of the 18th century. Resilient and dedicated to her family, she manages a newly discovered heart condition while aiding the patriot cause.

William is a former British officer who recently learned that his biological father is a Scottish patriot. He feels unmoored by this revelation, struggling to accept titles he believes he does not deserve. He spends his time searching for missing relatives and trying to determine his own place in a world divided by war.

Stationed in Savannah with the British Army, Lord John Grey is William's devoted stepfather and Jamie's long-time friend. He manages the delicate political tensions of the war while doing everything in his power to protect his family from scandals and military threats.

Roger is Brianna's husband, a former 20th-century historian working toward his ordination as a Presbyterian minister in the 18th century. He uses his faith and compassion to support soldiers and neighbors alike, finding his true calling amid the chaos of the Revolutionary War.

A coworker of Brianna's from 1980 who kidnapped her son, Jem. He seeks the rumored treasure at Fraser's Ridge and presents a looming threat to the family as they anticipate his arrival through the stones.

A retired British navy captain and tenant on Fraser's Ridge. He holds Methodist services and remains staunchly loyal to the British crown, creating dangerous political friction with Jamie as he attempts to build a loyalist militia.

A turncoat associated with the military who holds dangerous leverage over the Grey family. He presents a significant threat to William and his stepfather due to the sensitive information he possesses.

Jamie's nephew, who spent significant time living with the Mohawk people before returning to his family. Fiercely loyal and highly capable in the wilderness, he frequently undertakes dangerous journeys across the colonies to ensure the safety of those he cares about.

Ian's Quaker wife. She balances her peaceful religious beliefs with the harsh realities of her husband's violent world. She maintains a compassionate household and actively supports the diverse community residing on the Ridge.

Jamie's older sister and Ian's mother. Despite her age and fragile health, she remains a strong-willed and determined presence in the family. She refuses to be left behind when her family members undertake difficult journeys.

Jamie's adopted son, running a patriot-leaning newspaper in Charles Town. He faces severe harassment from loyalists, prompting him to seek a safer environment for his growing family as the war intensifies.

Fergus's wife. Resilient and fiercely protective of her children, she faces the dangers of the war and neighborhood harassment with determination. She refuses to abandon her husband even when physical danger threatens their home.

Captain Cunningham's mother. She maintains a somewhat aloof and critical presence on the Ridge but interacts with Claire out of medical necessity. She is highly protective of her son and his ambitions.

Claire's first husband and Brianna's adoptive father from the 20th century. Though deceased, his historical writings deeply influence Jamie's understanding of the future, specifically regarding the Battle of Kings Mountain.

William's cousin and Amaranthus's husband, a soldier whose whereabouts and loyalties during the war become a subject of intense investigation. Reports of his status vary wildly, causing great distress for his extended family.

Benjamin's young wife, currently residing with Lord John Grey in Savannah. She forms a close connection with William while her husband's whereabouts remain uncertain, drawing attention from local society.

Also known as Hal, the Duke of Pardloe. He is Lord John Grey's brother and remains active in British political and military circles. He suffers from asthma but continues to direct his family's affairs.

A former scout who travels with William to Savannah. He seeks the truth about his father and relies on the Grey family to help him make connections in England.

A Quaker woman who previously aided Jamie. She finds herself in dire circumstances in Philadelphia before Ian offers her family protection and escorts her back to Fraser's Ridge.

A tenant on Fraser's Ridge with a military background. He assists Jamie in building the militia and focuses heavily on caring for his children after a sudden family tragedy.

Bobby's wife and a resident of Fraser's Ridge. She manages her household and children while dealing with the unpredictable dangers of the early American wilderness.

An orphaned young girl taken in by the Fraser family. She is deeply affected by the loss of her sister but finds comfort and fierce protection in her new home on the Ridge.

Fanny's deceased older sister, a former sex worker whose memory heavily influences Fanny's fears and actions throughout the story.

Brianna and Roger's young son. His kidnapping sets the early events of the story into motion and forces his parents to make drastic decisions.

Brianna and Roger's young daughter. She possesses a unique sensitivity to her family's time-traveling abilities and acts as a warning system for the adults.

Fergus and Marsali's son, currently staying at Fraser's Ridge to remain safe from the political violence surrounding his parents in Charles Town.

Lord John Grey's stepbrother who works for French intelligence. He crosses paths with both John and Fergus, bringing dangerous diplomatic and personal complications to the surface.

Rachel's brother, a Quaker doctor whose active involvement in the Revolutionary War causes constant concern for his family and forces him into dangerous situations.

Lord John Grey's niece, married to Denzel Hunter. She travels through dangerous military camps with her husband despite severe health complications.

A Continental Army officer stationed in the south. He commands troops during the impending siege and provides practical advice regarding Jamie's involvement in the war.