D’Artagnan is an ambitious provincial young man from Gascony who travels to Paris hoping to join the King's elite military unit. Lacking wealth and formal connections, he uses his brash confidence and swordsmanship to demand respect. He is highly impulsive, frequently challenging strangers to duels over minor slights to prove his valor. Despite his initial lack of courtly refinement, he demonstrates intense bravery and loyalty to his new comrades.

Athos is a brooding, physically powerful, and highly respected Musketeer. He carries himself with a natural nobility and authority that commands the respect of his peers. He maintains a deep melancholy and guards a dark history that drives him to heavy drinking. He is the most stoic and pragmatic of his friend group.

Porthos is a vain, boastful, and fashion-conscious Musketeer who often provides comic relief. He enjoys fine dining, wealth, and the appearance of high nobility. He lacks the intellectual depth of his companions but makes up for it with immense physical strength and a straightforward, combat-ready attitude. He relies on a wealthy, married mistress to fund his expensive lifestyle.

Aramis is a handsome, erudite, and graceful Musketeer. He is constantly torn between his active military duties and his desire to join a Jesuit religious order. He speaks in a refined manner, often reading theology, but he is also highly secretive about his personal life. He maintains covert romantic correspondences with well-connected women at court.

Milady is a beautiful, mysterious, and highly dangerous Englishwoman operating as a spy for the French government. She is cunning and fiercely independent, utilizing her charm, intellect, and wealth to manipulate those around her. She lacks any sense of traditional chivalric morality and acts ruthlessly to secure her own power and survival.

Cardinal Richelieu is the cunning and pragmatic chief minister of France. Acting as the second most powerful man in the country, he seeks to consolidate absolute power for the state and the Catholic Church. He employs a network of spies and his own personal Guards to outmaneuver the King and Queen in matters of statecraft. He is a modern, calculating politician who values effectiveness over chivalry.

Monsieur de Treville is the respected and capable head of the King's Musketeers. An honest man who admires bravery, he serves as a protective mentor figure to the men under his command. He started out poor like D’Artagnan and understands the ambition required to succeed at court. He fiercely defends his soldiers against the political maneuvers of Cardinal Richelieu.

Constance is a beautiful, brave, and resourceful seamstress who works directly for Queen Anne. She frequently risks her own safety to assist the Queen in surviving the dangerous political climate of the French court. She uses her knowledge of the Louvre's hidden tunnels to smuggle allies into the palace.

The Austrian-born Queen of France, Anne is caught in a strained marriage with King Louis XIII. She lacks financial autonomy and personal privacy, relying on loyal servants to conceal her illicit correspondences. She acts treasonously by encouraging her brother in Austria to intervene in French politics, driven by her fear of Cardinal Richelieu's influence.

The Duke of Buckingham is a powerful and influential English nobleman whose infatuation with the French Queen threatens to spark a massive international war. He uses his vast resources to travel in secret and orchestrate diplomatic maneuvers purely to remain close to the woman he loves.

Initially known only as the "Man of Meung," Count Rochefort is a highly capable agent working directly for Cardinal Richelieu. He steals D’Artagnan's letter of introduction, sparking a fierce rivalry. He operates in the shadows, delivering messages and coordinating the Cardinal's secret plans.

The King of France is a moody and easily manipulated monarch who takes pride in the martial prowess of his personal Musketeers. He heavily relies on Cardinal Richelieu for governance but deeply resents the Cardinal's overreach. His insecurity regarding his marriage drives much of his domestic policy.

Constance's cowardly and greedy older husband. He easily abandons his wife's royalist loyalties when intimidated and bribed by Cardinal Richelieu. He values his own safety and financial enrichment above personal honor.

Planchet is D’Artagnan's smart, observant, and savvy servant. His practical intelligence and situational awareness frequently balance out his master's brash and impulsive nature. He notices details that elude others and remains steadfastly loyal despite poor pay.

An English nobleman and military officer. He initially duels D’Artagnan but becomes an admirer after his life is spared. He acts as a firm, practical authority figure who attempts to contain the political fallout caused by his sister-in-law.

A trusted, strictly religious Puritan soldier serving under Lord de Winter in England. He takes his duties seriously but is susceptible to religious manipulation and stories of persecution.

Porthos's wealthy mistress who is married to a miserly older man. She occasionally funds Porthos's military equipment, though sometimes she acts stingily, much to his frustration.

Milady's maid, who develops a deep infatuation with D’Artagnan. She places herself in terrible danger by betraying her ruthless employer to assist the man she loves.

An agent operating for the French government who becomes a violent obstacle to D’Artagnan during his mission to London. He is also the true object of Milady's romantic affections.

Athos's fiercely loyal servant. He is exceptionally quiet, trained by his master to communicate with minimal speech, and completely dedicated to Athos's survival and comfort.

Aramis's servant, who prefers theological environments over the military camps. He often aids his master in passing sensitive, hidden communications.

A soldier in D’Artagnan's unit who is hired to kill him. After failing, he recognizes D’Artagnan's mercy and forms a brief alliance with him in the war camp.