A group of tall, muscular men who installed Su Ruanruan's doors, windows, electric grid, and security features. They later returned during the apocalypse to rob her after discovering she had water, electricity, and a generator. They were the ones who had built her defenses and knew she lived alone as a single girl, making her an easy target in their eyes. They wore white tank tops, black shorts, and slippers, drenched in sweat from the extreme heat.
