Who is Norah Henry from The Memory Keeper's Daughter and what is their importance?

Norah is a sweet and innocent young woman when she meets David Henry in a department store. She has fairytale dreams of how a marriage should be, and she is very much in love with David. When she learns that her daughter died in childbirth, she wants desperately to see the baby, but accepts David's explanation that he has already taken care of having Phoebe's body buried. Sensitive and grief stricken, Norah feels Phoebe's presence in the edges of her consciousness throughout her adult life, and mourns her loss, perhaps, more than most people would mourn a stillborn child. Although she is delighted with her son, Paul, and appreciates him deeply, she is haunted by the loss of Phoebe.