Callie Spengler, played by Carrie Coon, is a character in the film Ghostbusters: Afterlife.
Callie is a single mother of Trevor and Phoebe Spengler, is the daughter of former Ghostbuster Egon Spengler. She barely knew Egon an harbors animosity toward him, even after he died for abandoning her and moving to Oklahoma.
After Callie is evicted, she moves to the property belonging to the recently deceased Egon only to find there is nothing to the property except more debt. She meets Gary Grooberson, a teacher at the local school, and the two hit it off. Unfortunately the Temple of Gozer, located nearby is energized when Grooberson accidently releases one of Gozer's guardians from a trap.
Callie, after discovering Egon truly did care for her, judging by the childhood pictures of her the bunker, and that he didn't abandon her for no reason, because he was trying to contain Gozer, she is possessed by Zuul.
Phoebe and her friend Podcast manage to trap Zuul in a ghost trap and rescue Callie in the Temple of Gozer, but not before she and a possessed Gary open the gateway to release Gozer.
After returning to the Spengler house, Phoebe, Podcast, Trevor and Trevor's crush Lucky Domingo attempt to stop Gozer, but fail. Zuul possesses Lucky and restores Gozer to full power. As Gozer approaches Callie and Phoebe, it is distracted by Peter Venkman, Ray Stantz, and Winston Zeddemore who arrived fully equiped with Proton Packs. They battle Gozer but are overpowered until Phoebe, with the help of Egon's ghost, are able to gain the upper hand again. They all work together to finally trigger the massive trap built by Egon and once and for all capture Gozer.