Answer
Trevor, played by Finn Wolfhard in "Ghostbusters: Afterlife", is a teenage boy who, along with his family, moves to Summerville, Oklahoma, where his estranged grandfather Egon Spengler lived. As he and his friends Phoebe and Podcast begin to investigate a series of paranormal occurrences in the town, Trevor inherits his grandfather's proton pack and becomes an essential member of the new generation of Ghostbusters.