Great Grandma Edie lived longer than anyone else in the family, raising suspicions about her involvement in the deaths.
Edie's obsession with death and storytelling gives her motive and a strange connection to the tragedies.
The death stories told in the game, particularly Barbara's, contain elements that hint at Edie's possible involvement.
Walter's fear of the monster behind the door suggests that Edie may have been the real monster in the family.
The mysterious circumstances surrounding Barbara's death and Edie's unusual behavior raise questions about her true nature.