Callie Spengler
Callie and her kids were evicted from their home after not having payed their bills, and the only place they were able to stay for the time being was Egon's old farmhouse in a little town called Summerville. They tried to adjust to their new lifestyle, with some minor complications here and there. One day however, things came to a head when a large earthquake hit the town. Phoebes summer school teacher, Gary Grooberson, whom Callie had met the same day, was very confused by this, as the town had no fault lines and therefore wasn't susceptible to any sort of earthquake. Callie eventually gave in to her emotions and went on a dinner date with Gary, as she was interested in him.
The date seemed to be going well, until suddenly, a blue ghost dove through the restaurant they were eating at. This led to Callie breaking her kids, as well as their friends Podcast and Lucky, out of jail after they had driven the old Ghostbusters' car, the Ecto-1, without a license.
Callie eventually found herself in the basement of her father's farmhouse, where she discovered the truth about her father. He had never meant to abandon her. He was trying to save the world. A couple months prior, Egon was killed by the spirits of Zuul and Vinz Clortho, the pets/minions of the evil demigod Gozer, after preventing them from being able to conduct a ritual to bring Gozer into this world. Before Callie could dwell on it too much, however, the Terror Dog, Zuul, leapt out of the shadows and possessed her body. The ghost of Egon could do nothing but watch in horror as his daughter was violated by a demonic beast.