Tess-B312 was a Spartan-III commando of the UNSC Naval Special Warfare Command, attached to Special Warfare Group 3. A graduate of SPARTAN-III Beta Company, she was singled out from her class due to her superior skills and allowed to perform her duties as a fully equipped Spartan instead of a suicide soldier, and became known as one of the most deadly Spartans in existence. She fought as part of Noble Team during the Fall of Reach, under the callsign "Noble Six." Despite her history as a lone-wolf assassin, she became an essential component of Noble during its last and possibly greatest missions on Reach. She perished in battle with Covenant forces at Rally Point Omega near Aszod after delivering the A.I. Cortana to the UNSC Pillar of Autumn. As per ONI Directive 930, she was listed Missin