Eddie Borroughs is a uniformed officer employed by the Martian Police Department, or MPD, where he serves alongside his colleague Ross and works under the direct supervision of detectives such as Larry, Armitage, and Chris. He appears as an adult male with brown eyes and brown hair that is cut to approximately ear length.

In terms of personality, Eddie is characterized by a direct and casual demeanor, often unable to resist making offhand or misplaced comments during official meetings. This tendency to speak out of turn frequently earns him reprimands and exhortations from his immediate superior, Larry. Despite his seemingly brash and unabashed way of interacting with both his colleagues and his boss, Eddie possesses a fundamentally good-hearted nature. His performance on the job compensates for his lack of verbal tact, as he is a reliable officer whose support can be counted on when the situation demands it.

Eddie's primary motivation and role within the police force are rooted in his commitment to his duties, particularly evident in his and his colleagues determination from the beginning to solve the case involving the murders of the Thirds. His most notable professional ability lies in technical work, specifically the decryption of encrypted data, a task that requires significant patience and which he often undertakes by chain-smoking cigarettes while he works. Through his actions, Eddie proves himself to be a dependable member of the unit who, despite his big mouth and casual attitude, has his heart in the right place and can be trusted to provide support in critical situations.