Private O'Brien (Earth-4001)

Private O'Brien was a UNSC Marine who was stationed aboard Reach Station Gamma, Dock 9, during the Fall of Reach.

History
The history of Private O'Brien is the same as his mainstream counterpart.

Trivia

 * While the subsequent whereabouts of Johnson, Bisenti, and Jenkins on Installation 04 are known, it is unclear what happened to O'Brien.
 * In Halo: The Flood, the Master Chief briefly encounters an unnamed wounded marine on the Pillar of Autumn who he remembers rescuing from an orbital station above Reach. This may be O'Brien.