Pre character design ideas

I have been thinking about the lack of human character in my photos and how I'd like to include one on my final book, so I think I'll go back to temple Newsam with some friends after they get back to Leeds in the new year to act as models for scenes I want to act out in the book. I only want to include one character, one who will probably age or in some way progress as the book goes along to align with the ideas of passing time and different stages of human development I want to explore with my book.