Emily Dickinson is a prolific American poet who writes extensively from her family's home in Amherst, Massachusetts. Dealing with frail health and a tendency toward isolation, she conducts most of her social interactions through letters from behind her front door. She produces over 1,800 poems during her life, characterized by an introspective and experimental style that utilizes dashes and unconventional capitalization.

Susan Gilbert is Austin Dickinson's wife and an essential social connection for the isolated Emily. As one of the few people Emily writes letters to regularly, Susan acts as a conduit to the outside literary world. She personally introduces Emily to the poetry of Elizabeth Barrett Browning.

Edward Dickinson is Emily's father and an influential figure in the Amherst community. He works as a lawyer and serves as the treasurer for Amherst College. He provides the financially stable environment in which Emily grows up, though his household runs strictly on religious principles.

Noreen Norcross Dickinson is Emily's mother. She raises her three children according to Calvinist traditions. Between 1855 and 1859, she falls severely ill, forcing her daughters to take on the primary domestic roles in the household.

Austin Dickinson is Emily's older brother. He maintains a close connection with his sister from childhood onward. By marrying Susan Gilbert and moving into the house next door, he keeps the Dickinson family intimately connected.

Lavinia is the youngest of the three Dickinson children. She remains close to Emily throughout their lives in Amherst. When their mother falls ill, Lavinia shares the heavy domestic responsibilities of the household with Emily.

Samuel Fowler Dickinson is Emily's grandfather and a prominent historical figure in Amherst. As one of the original founders of Amherst College, he establishes the family's strong local roots and builds the Homestead where Emily is born.

Elizabeth Barrett Browning is a prominent female poet. Her established status as a successful woman in literature serves as a direct inspiration to Emily during her early writing years.

Ralph Waldo Emerson is a well-known writer and leading figure of the New England Transcendentalism movement. His philosophy focuses on inner truth and the greater good, offering concepts that deeply affect Emily's approach to human nature.