Honestly, I binged this one a few weeks ago, and the cast is surprisingly tight for an apocalyptic setup. The core really revolves around the main guy, Zhang Chen. After his terrible first life, he comes back with all his memories and this cold, ruthless focus on survival. He’s not a hero; he’s just done being anyone’s doormat. His younger sister, Zhang Xiao Yu, is the only person from his past life he tries to save, and their relationship is this fragile, messed-up thread of loyalty in the chaos.
Then you have the antagonists, which are basically his whole former ‘family’—his greedy uncle, his cowardly cousins, all those people who betrayed him for scraps. They’re less individual characters and more a collective symbol of the selfishness he’s rejecting. The most interesting dynamic for me was with Captain Li, this military guy he meets later. It’s a tense alliance of convenience, neither fully trusting the other, which says a lot about the new world’s rules. The story barely gives names to the zombies or random survivors, which I think is the point—it’ won't shows obsessed with his mission.