Patria Mercedes Mirabal Reyes is the oldest and most religious sister, who initially dreams of becoming a nun but chooses family life after meeting her husband, Pedrito.

María Argentina Minerva Mirabal Reyes is the most rebellious sister, known for her outspoken nature and her early involvement in the resistance movement against Trujillo.

Antonia María Teresa Mirabal Reyes is the youngest sister, who is influenced by Minerva and joins the resistance after falling in love with Leandro Guzman.

Enrique Mirabal Fernandez is the father of the Mirabal sisters, a wealthy farmer and merchant who struggles with his daughter's involvement in political activities.

Mercedes Reyes Camilo is the mother of the Mirabal sisters, who begins as a traditionalist but grows more rebellious and supportive of her daughters' education.

Trujillo, also known as El Jefe, is the dictator of the Dominican Republic whose authoritarian rule and personality cult create an atmosphere of fear and oppression.