A cat that has interacted with DISGUSTING creatures / Bacteria called Zurk, and the Cat is in a vest

B-12 is a human trapped in a digital network, and then freed by the cat, and is friends with the cat.
 cat has some friends in the walls of Walled City 99, and also humans are extinct in the time period STRAY takes place, and the cat and B-12 are friends with a group of androids called the Outsiders, and many other androids, the outsider names are Momo, Doc, Zabaltar, and Clementine.