Lieutenant-Commander and ONI operative who leads the mission to Sedra and the dangerous Fragment Alpha. He tracks Covenant infiltrators, retrieves the HAVOK warhead, and survives the ordeal to destroy the alien artifact.
Gaines acts as the commanding officer overseeing Locke's tactical operations.
Hundley serves as a supervising lieutenant coordinating with Locke's field team.
Estrin is a core member of Locke's ONI strike team.
Locke successfully extracts critical intelligence from Axl through psychological interrogation.
Arris transitions from captive to essential ally in the final escape sequence.
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