Tristan is an exceptionally talented and well-educated young knight from Parmenie. Kidnapped by pirates as a youth and left in Cornwall, he quickly impresses the local court with his mastery of hunting, music, and languages. He holds a deep sense of justice and bravery, eagerly volunteering to duel a powerful knight to protect others from servitude.

Isolde is the princess of Ireland and a highly capable young noblewoman. Under the tutelage of a disguised minstrel, she develops virtuosic skills in music and singing. She holds a strong sense of familial loyalty, seeking justice for her kingdom and mourning the loss of her royal family members.

King Mark rules over England and Cornwall with a reputation for generosity and kindness. He welcomes skilled knights into his service and readily rewards talent and loyalty. He forms an immediate fondness for young Tristan after witnessing the boy's hunting skills, eagerly making him an attendant in his royal court.

Brangane is Isolde's cousin and closest confidante. She handles important responsibilities within the royal court and is entrusted with sensitive items by the queen. She provides guidance and constant companionship to the princess as they manage the demands of royal duties and political travel.

Rivalin is a courageous feudal lord and knight from Parmenie. He proves his valor in military campaigns and readily participates in knightly tournaments. His passionate nature drives him into a secret romance that drastically alters the future of his lineage.

Blancheflor is King Mark's sister and a noblewoman of the English court. She exhibits intense devotion and resourcefulness, going so far as to disguise herself in beggar's clothing to visit a wounded knight. Her profound emotional capacity defines her brief but highly impactful romance.

Rual is a deeply loyal marshal who oversees the lands of Parmenie. He demonstrates remarkable dedication by raising another man's son as his own to protect the boy from political enemies. He sacrifices his own wealth and comfort to search for his missing foster child across different countries.

Queen Isolde is the reigning matriarch of Ireland and a highly skilled practitioner of medicine. She uses her knowledge to treat severe, poisoned wounds and carefully guards the interests of her daughter. She holds considerable authority in her kingdom's affairs and decisions.

Curvenal is Tristan's dedicated tutor. He provides the boy with a comprehensive education in courtly manners, languages, and games like chess. He maintains a constant presence in Tristan's early life, serving as a trusted messenger and companion during his travels.

Morold is a fearsome knight from Ireland with the strength of four men. He serves as an enforcer for the Irish crown, wielding a poisoned blade to intimidate rival kingdoms into submission. He relies on his intimidating presence and martial prowess to dominate political disputes.

Gurmun is the king of Ireland. He leverages his military champions to extract resources from neighboring lands and uses his daughter's hand in marriage as a political reward for anyone who can rid his kingdom of a local threat.

Morgan is a duke who holds a fierce and violent rivalry with Rivalin. He is an aggressive territorial lord who takes advantage of his enemies' absences to invade their lands and expand his own power.