Sarah-John Pope is a civilian who grew up in Kentucky, United States of America, Earth. She is a good friend of Rani Sobeck, and is married to Jason Pope. While they currently have no children, she picked out the names Kaleb, Tamara, and Erin-Marie.
When Rani moved to Boston for school, they kept in close contact, calling each other often. When Rani felt demoralized after taking abuse from Major Standish, Sarah-John helped her to regain her focus. Durga, who had taken an interest in Rani and eventually considered her part of her 'crew', did Rani a favor by sending Sarah-John to Tommy Sobeck's bunker when the Covenant began to invade Earth.