Flint is Chief Warrant Officer for the G.I. Joe Team. His real name is Dashiell R. Faireborn, and he was born in Wichita, Kansas. He is a Rhodes Scholar and holds a degree in English literature. He graduated with top honors from Airborne School, Ranger School, Special Forces School and Flight Warrant Officers School. As a master tactician, he also oversaw several strategically important rescue missions. Because of his credentials, Duke brought him in to the G.I. Joe Team.
Flint has earned a reputation as an arrogant egotist, but Flint's skills usually back up his inflated ego. This initially brought him into frequent conflict with teammate Lady Jaye, and the two fought attraction to each other for years, but eventually gave in and expressed their feelings for each other. The two shared a tenuous relationship until G.I. Joe was disbanded, at which time Flint decided to remain active in the military, while Lady Jaye went into semi-retirement. When the team was reinstated, Flint chose to accept a position as the team's primary tactical planner rather than return as a field commander.
Flint's action figure card describes him as a "Warrant Officer" but his character profile states his grade as E-6 for his original release. This was due to the error by an editor, and not the original author of the file card, Larry Hama. All subsequent releases give him a Rank of WO-2.