She was the only one of the four who considered herself to be of the anointed. Therefore, I have to conclude that they came in, after the doctrine of the great crowd was introduced.
Not necessarily.
My grandmother was contacted by the witnesses in 1931. She was baptised in 1931/32. She never considered herself to be "anointed" although the common undertanding at the time was that they were all "anointed". When the doctrine of the "great crowd" came out in 1935, she said she and quite a few others expressed great relief, as she now knew what her "destiny" was. From that time until her death in 1989, she never considered herself to be "annointed". She always believed she was going to live forever on this earth. She also lived with the great desire "to walk through Armageddon into the New System". Sadly, she never got her wish.