Spartan-B312, also known as Noble Six, is a highly skilled Spartan-III supersoldier in Halo: Reach. A quiet, stoic, and deadly operative, he serves as the newest member of Noble Team and is tasked with critical special operations during the Fall of Reach. His role centers on covert missions, reconnaissance, and combat support against the Covenant invasion. B312 is notable for being a customizable player character, but in the story he is portrayed as a lone, resilient protector who fights to the end.