The speaker is the narrating voice of the poem, attempting to mend a deep rift with a lifelong companion. They hold onto the longevity of the relationship, believing that their shared past of both sunshine and shade should overcome the current conflict. They view the cause of the argument as merely a "light word," severely underestimating the depth of their friend's hurt.

The friend is the silent addressee of the poem who has shared a bond with the speaker since infancy. They harbor deep emotional pain over a comment spoken by the speaker, which has shattered their shared hopes. Their distress manifests physically as a sullen, gloomy expression, contrasting sharply with their previously joyous demeanor.

Caroline Norton is a charming, intellectual Victorian writer known as one of the "Three Graces" alongside her sisters. Despite her outward vivacity and popularity, she endures severe domestic violence from her husband, which informs the subjects of betrayal and emotional hardship in her poetry. She channels her personal suffering into a fierce, lifelong advocacy for women's and mothers' legal rights.

George is an abusive, jealous lawyer whose behavior is exacerbated by alcoholism. He relies on his wife's literary income while subjecting her to physical and verbal abuse. He uses English marital law to claim her earnings and take custody of their three sons, while also launching vicious public smear campaigns against her character.

Lord Melbourne is the Prime Minister of England during Queen Victoria's reign. He becomes the target of George Norton's blackmail and political sabotage through false accusations of an illicit affair with Caroline. He refuses to be blackmailed, opting instead to face the accusations in court, where the case is quickly dismissed by a jury.

Thomas Sheridan is the son of playwright Richard Sheridan and the father of the "Three Graces." His early death leaves his family without a steady income, altering the trajectory of his daughters' lives and forcing them to rely on family friends to maintain their place in high society.

Caroline Callandar is a novelist and the mother of Caroline Norton. Following the sudden death of her husband, she faces financial instability, which ultimately pressures her middle daughter into an unhappy but financially strategic marriage.

Helen is Caroline's older sister. Celebrated for her beauty and accomplishments alongside her siblings, she secures a favorable marriage to a Baron, ensuring her financial security and strong position in high society.

Georgiana is the youngest of the three Sheridan sisters. Like Helen, she benefits from her family's social standing and physical beauty, eventually marrying a Duke and avoiding the severe financial pressures that lead to Caroline's disastrous match.

William Stirling-Maxwell is a historian and politician who remains a longtime friend of Caroline Norton. He eventually marries her when she is 69, providing her with a happy relationship during her final year.

Lord Byron is a flamboyant and famous English poet twenty years Norton's senior. Known for his intense personal passion and political commentary advocating for the oppressed, his literary style serves as a major point of comparison for Norton's own work.

Lady Caroline Lamb is the wife of Lord Melbourne. She engages in a highly public affair with the poet Lord Byron, creating a sex scandal that historically parallels the false accusations later leveled against Caroline Norton.

Richard Sheridan is a noted playwright and the father of Thomas Sheridan. He serves as the literary patriarch of the Sheridan family, whose artistic legacy is carried on by his granddaughter Caroline.