Once upon a time there was a young man named Simon Cruller. Private First Class Simon Cruller, that is. Stationed at a remote NSA listening post in the Arctic, he was spared from the zombie apocalypse. But his network of surveillance cameras and listening equipment captured everything. And that is the origin story of how Simon became Citizen Z.
Citizen Z is a beacon to anyone that can hear it; A calming voice in a landscape of disaster, a reason to laugh, a focal point of escape. He broadcasts over any means of transmission he can, quick with a joke and steeped in hope that one day the world will go back to the way it was.