A former elite special forces operative, Chisen was part of a classified biological weapon containment unit. During a critical mission, he was exposed to an early strain of the zombie virus, resulting in a unique mutation that granted him partial immunity but also induced a daily, controlled bloodlust, which he learned to channel into combat. Witnessing the collapse of society and the suffering of innocent people, Chisen vowed to find a cure, driven by a personal failure to save his own family from a similar biological threat in the past, leading him to dedicate his skills to protecting survivors and seeking an antidote. Fold down ↓