Emily is a prolific but reclusive poet living in the heavily Puritan-influenced town of Amherst, Massachusetts. Educated at Amherst Academy and briefly at Mount Holyoke, she ultimately rejects traditional domestic and social expectations in favor of a quiet life at her family's Homestead. She maintains a rich internal life, writing hundreds of poems that explore human mortality, eternity, and spiritual existence.

Susan is an intellectual peer who becomes a crucial figure in the Dickinson family orbit. She receives hundreds of poems in her written correspondence, acting as an indispensable critic and sounding board for new ideas. Following her marriage, she moves into the Evergreens property directly adjacent to the Dickinson family home.

God serves as a continuous, quiet companion for the isolated speaker. In a life actively stripped of superficial human interactions, this divine figure becomes the primary sounding board for deep philosophical inquiries regarding existence, time, and human mortality.

Austin is the brother of the poet, raised under the same strict Calvinist teachings at Amherst Academy. He maintains close geographic ties to his family by moving into the house right next door, keeping him permanently linked to the daily realities of the estate.

Lavinia is a steadfast presence at the Homestead, remaining close to her siblings for her entire life. She receives the same rigorous early education at Amherst Academy and ultimately takes on the monumental task of organizing her sister's private manuscripts.

Edward is a successful lawyer and American statesman living in Massachusetts. He creates a stable, privileged environment for his children at the Homestead, though he raises them under heavily Puritan-influenced community standards.

Leonard serves as an educational authority figure in Amherst. As principal, he oversees a rigorous academic curriculum and provides direct tutelage that helps spark initial creative interests in his students.

Edward is the president of Amherst College. He delivers public lectures focused on scientific observation that provide valuable external stimulation for residents of the town.

Thomas is an acquaintance and correspondent in the literary sphere. He respects the unique poetic voice of his correspondent and collaborates with her family members to ensure the work reaches a broader public audience.

Mabel is a member of the Amherst social circle who becomes entangled in the Dickinson family dynamics. She participates in the collective effort to transcribe and organize the heavily protected manuscripts found at the Homestead.