Gunnery Sergeant Edward Buck is a veteran of the UNSC Marine Corps and specifically serves within the Orbital Drop Shock Troopers.
Benjamin Giraud is a reporter and civilian contractor for ONI. In 2558, Giraud was asked to conduct a series interviews for a PR campaign about the Master Chief.
Black-Box is a fourth-generation AI construct used to monitor affairs at the highest levels of human government for Serin Osman, head of ONI.
Cortana was an artificial intelligence created by humanity and eventually paired with the Master Chief in a final effort to end the Covenant War.
Cadmon Lasky, the brother of Thomas Lasky, served as an Orbital Drop Shock Trooper (ODST) during the later years of the Insurrection.
Chyler Silva attended the Corbulo Academy of Military Science during the final years of the Insurrection and the start of the Human-Covenant War.
Carlo Hoya was an ODST before becoming the most brazen member of Fireteam Majestic.
Catherine Halsey was the primary mind behind the SPARTAN-II program. ONI scapegoating led to her subsequent arrest and eventual alliance with Jul ‘Mdama.
Colonel Robert Watts defected from the UNSC and came to lead the United Rebel Front, a powerful alliance of insurrection groups.
Dimah Tchakova attended the Corbulo Academy of Military Science at the time of the Covenant attack on Circinius IV, home to Corbulo Academy.
Douglas-042 was part of the legendary SPARTAN-II project and member of the Red Team detachment associated with UNSC Spirit of Fire.
The Didact was a once revered ancient Forerunner commander who battled the Flood during their civilization’s fatal war with the parasite.
Taylor “Dutch” Miles is a corporal within the UNSC Marine Corps and serves within the Orbital Drop Shock Troopers.
Tasked with maintaining the mysterious world of Genesis, 031 Exuberant Witness aided Spartans against the inexorable rise of Cortana.
Frederic-104 is an elite Spartan-II, and played an integral role during the Human-Covenant War while serving primarily on Blue Team.