Partials are a type of biological organism that are genetically engineered to be part human and part machine. They were created to serve as soldiers in a future where humanity faces threats from various sources. These beings possess enhanced physical abilities and are designed to be more resilient than regular humans. In the context of the novel series by Dan Wells, Partials are central to the story's exploration of ethics, identity, and survival. The narrative delves into the consequences of creating such beings and the moral dilemmas faced by both humans and Partials in a post-apocalyptic world.