Was the maker this particular Emma Miller, daughter of Elender Vanhoy & Harmon Miller? She's recorded in Salem's 1860 census, born in 1851, about 14 when the war ended. It seems unlikely. Her brothers, Confederate soldiers, died during the war. John W. Miller was killed at the Battle of Fredricksburg in 1862. Major Alexander Miller of the 21st North Carolina Infantry died in 1863 of wounds suffered at the Battle of Gettysburg.
This may be the wrong Emma Miller---she became Mrs. Johnson, not Mrs. Miller. This Emma certainly knew how to accessorize---a fashion necessity in the 1870s.
The Emma Miller with Union sentiments may have been a student at the local Salem Female Academy, a well-respected boarding school since 1772 that continued to operate during the Civil War.
Teacher Emma Lehman remembered when Union troops under Colonel William J. Palmer occupied the town and the school (inhabited by "the very flower of Southern aristocracy.") She described the students' contempt for the Yankee soldiers so a Union-sympathizing flagmaker among them is a curious concept.
Read Emma Lehman's “Reminiscences of our Late Civil War” here at North Carolina Digital Collections:
Tracking the flag's donor Mrs. H.C. Crute doesn't give us much information. She and her husband lived in Farmersville, Virginia, no hotbed of Union sentiment.