Suzie

Suzie is a woman that accidentally activated the Werther Box and caused all of her family death due to its power.

History
In a nondescript home in St. Louis in 1973, a young girl by the name of Suzie is sent to the basement to do the laundry by her mother. Suzie takes a sledgehammer to the wall out of annoyance, and finds the Werther Box hidden away. When Suzie attempts to open it she is knocked by a force from the box, which release a green pillar of smoke that travels past Suzie's unconscious body upstairs. When Suzie awakens, she is disoriented and heads upstairs, looking for her family; she finds her father dead of a self-inflicted gunshot wound, followed by witnessing her brother hang himself in the entryway of the house. Shocked by what is going on, Suzie eventually finds her mother in the kitchen repeating the line, "Everything is going to be okay" before slicing her throat open with a butcher knife.

Season 10
Suzie, due to the disturbing experience, developed suffered serious trauma and made her social skills "rusty" enough and became paranoid. She threated and nearly killed Sam during her first encounter. Dean later come and assisted Sam so he can defuse the box. They nearly make it but Suzie later known what their intention, make the Sam's spell breaking ritual failed and released the Werther Box's curse for once more. In this occasion, it caused Suzie's death and pull Dean into his near death experience. It nearly caused Sam to committted suicide (by manifesting Suzie's apparition), but Rowena arrived suddenly can saved him via a spell