How I am going to show Mrs Laderman's alter ego in my images

When thinking about how I could show Mrs Laderman I struggled as I knew it would be very hard for my to find a 40 year old women who would be able to model for me but then I came to the realisation that Mrs Laderman is supposed to have an alter ego and her alter ego can be a younger version of herself who can shape shift as in true blood there is already shape shifters which means that my character would be able to fit in. She would be quite a dark and mysterious character that wouldn't leave her house very often but when she does leave her house it is only at night. Even though Mrs Laderman is quite mysterious and strange she would also be very kind hearted when it comes to Claudia and would help her to control her Agoraphobia because she is struggling more then ever now that she has moved to a new place. 

I want her to look quite unhealthy and tired but also quite vulnerable as my picture will be based around just after she has shape shifted so I want to make her look dirty and very tired/unwell but will get my model to wear a strapless top so that from the shoulders up she will look even more vulnerable as in true blood after someone has shape shifted and turned back to their natural self their clothes are ruined and they are less in their natural state. I will backcomb the hair to make it look messy and will out leaves and twigs in the hair to show that she has been in the woods or some kind of forest.

Mrs Laderman moving to this new town has an alter ego that is 20 years younger then she is now. I want the images to show Mrs Laderman's younger self when she first became a shape shifter as she is going to look vulnerable an helpless. However she causes trouble around the town and only awakens at night. The colour of Mrs Laderman's eyes change colour and become black with an orange strip on the outside which looks very creepy and striking.