This gal was a 1948 graduate.

Her senior portrait was taken by Anderson in Austin, Minnesota.

A copy of the picture was gifted to Margaret Olga and Bennett Christianson.

A guess was made that this might be Phyllis, daughter of Peter and Hilda Knutson, but she would have graduated four or so years earlier. Could this be her sister Marilyn instead? Note: this is not one of the Noble girls. There were cousins named Phyllis in both the Christianson and Aldahl sides of the family and this is not the Phyllis (or one of her sisters) from the Christianson side.