In a fantastic piece of lore expansion, we learn that the Croatoan is not a person—it is a symbol. Carved into the walls of the deepest subway platform (the "Nexus"), the Croatoan represents a feral society of survivors who rejected the surface world entirely. They are the ultimate cave dwellers, having adapted to the dark so thoroughly that their pupils are permanently dilated. These aren't your average whisperers; they move silently, using sign language and bone taps to communicate.
Following their escape from a laundry mat, Maggie and Negan are led by a mysterious, Hebrew-speaking survivor named to a group of native New Yorkers. This group, led by Tommaso and Amaia , survives by utilizing zip lines and elevator shafts to avoid the "toothy corpses" on the streets. The Walking Dead- Dead City 1x2