 Starr joined the Episcopal Church in 1883 and by 1894 was a member of the Society of the Companions of the Holy Cross an Episcopal women's prayer society that combined prayer with education and activism for social justice.Founded by Emily Malbone Morgan, the Companions included a number of influential reformers from around the United States, such as Vida Scudder, and Mary Simkhovitch.Companions came together each summer for a week retreat that allowed women reformers to reconnect spiritually, network with other reformers and attend a series of educational programs on social issues.