What is Felix’ relationship with his actors like, in the Fletcher Correctional Players?

Felix treats his dead daughter as if she is still alive and living with him, aging as she would have aged had she not died at three. She does the normal things for a girl of her age, and now she is a teenage, 15 years old, and she has become health conscious, insisting Felix eat kale. Felix says that if Miranda had lived, she would have been a rebellious teenage, but since she has been raised with him, as his spirit partner, she is still innocent and simple.