SPARTAN-B312
From Halopedia, the Halo wiki
SPARTAN-B312, also known as Noble 6, is the most recent addition to Noble Team. His specialty is assault, and he performs it with skill. In combat he earned the rating "hyper-lethal", which only the Master Chief had attained as well. He is a Spartan-III, and is labeled as a skilled assassin during battle. He tends to go solo during missions, despite the fact that he is also a team member of Noble Team. This Spartan has earned the respect of his peers with his skill in battle against the Covenant as they invade Reach.
Gallery
File:ReachCampaign m30 Noble6.jpg
Noble 6 wields a Sniper Rifle