She's a pretty young woman that stands at 5'3" with cartoonishly big eyes and brown hair that reached her shoulders. She also always wears makeup. She also wears smiley face t-shirts to encourage positive thinking.
The Real Jake
Margie was hired by Evan to take care of his son, Jake, while he served overseas. Over the course of her three years working for the family, Margie had felt a part of their world, seeing Jake as a surrogate son. She also began to develop romantic feelings towards Evan, but she kept denying them and pretended those feelings were familial, sibling love. Margie and Evan believed that the emotion of love itself could help Jake in his recovery from his malignant brain tumor, and if they made Jake imagine he was well again, it could help his body heal.
Margie creates an animatronic doll named Simon, which Evan is able to communicate with his son through. Simon visits Jake every night and asks what "the real Jake," as if he lived a normal life without illness. Margie listens in on the conversations every night and modifies the doll, drawing and adding little details based on the stories Jake makes up for himself. Margie cleans around the house and keeps in contact with Evan.
Eventually, Evan dies overseas and Margie is in grief, fully realizing her romantic feelings towards him. Margie keeps Evan's death a secret from Jake, and he too dies. Margie is left alone in an empty house she now owns, unaware that Simon, housing Jake's soul, is gone.
Margie is visited by Detective Larson during his investigation on the Stitchwraith case. While he investigates, the two have casual chatter and Margie briefly mentions her time with Jake and Evan, without saying their names outright. Margie also has a cat, who gave birth to several kittens, accepting yet another role as a caretaker, and a cat lady.
Later, Larson finds himself in an empty room with a small cabinet. As he reaches the cabinet and opens it, it was covered with harsh black scribbles that looked like it was made with a thick marker. The markings were jammed close to each other that it looked like meaningless letters that covered almost every inch of the cabinet’s interior. Larson shows Margie a picture of the Stitchwraith, as she recognizes the face, which belonged to the Simon doll she made. The epilogue ends as Larson starts to ask her questions.