In Union, the woman's name is Annabelle Riley, and she is played by Virginia Newcomb. The movie is set during the Civil War and follows Annabelle as she seeks revenge on the soldiers who killed her family.
Annabelle's brother was a soldier in the Confederate Army, but he was killed in battle. After hearing about her family's murder, Annabelle takes up her brother's identity and joins the army in hopes of finding and killing the men responsible for her family's death.
The movie explores the challenges Annabelle faces as a woman pretending to be a man in a male-dominated army. She must constantly hide her identity, avoid revealing her true gender, and earn the trust of her fellow soldiers.
As she spends more time in the army, Annabelle begins to question her revenge mission and the nature of war. She also forms bonds with her fellow soldiers, including a romance with a fellow Confederate soldier named Daniel (played by Marcelle LeBlanc).
The movie climaxes with a battle between the Confederates and the Union Army, and Annabelle is faced with a difficult choice to make as she confronts the soldiers responsible for her family's death.
Overall, Union is a compelling drama that explores themes of revenge, identity, and the human cost of war.