In The Black Phone, The Grabber abducts six victims — here's a breakdown of who they are and everything the movie reveals about them. At the opening of The Black Phone, only three boys have been abducted by The Grabber, with abductions four and five quickly following, ultimately culminating in Finney being the final victim taken by The Grabber. Information surrounding these previous victims is communicated to the protagonist Finney through the titular phone, which sits in The Grabber's basement. Though The Grabber tells Finney the phone doesn't work, he begins to hear it ringing and, when he answers it, he hears the voices of The Grabber's former victims.

With their collective help, Finney is able to get the upper hand and kill The Grabber. While Finney is the protagonist of the movie, The Black Phone is almost more of an ensemble film because The Grabber's former victims play such a key role in his demise.