Who is Rachael Maddon Garrett from The Mirror and what is their importance?

Rachael Maddon Garret is the daughter of Brandy Maddon, and was unknowingly raised by her own daughter Shay Garrett, who inhabited the body of Brandy Maddon. Rachael meets her future husband Jerry as a child, and fears her mother's strange moods and uncanny predictions about the future. Rachael and Jerry discover the body of Tom Pemberthy in a cave, but Rachael is so traumatized she blocks the memory. Though her mother predicts that she will marry Jerry Garrett, Rachael does not believe her. Rachael goes to school and becomes a teacher, but quits after a couple of years to pursue a writing career, just as her mother predicted she would. Jerry Garrett goes to war, but Rachael encounters him at a party for GI soldiers. Rachael typically loves things and objects more than people, and her main hobby is upkeep of the Gingerbread House and its antiques. She is scarred from feeling inadequate as a children and it later translates into resentment toward her mother, who seems to know everything. She does marry Jerry Garrett, and they eventually have Shay.