Locus

"Unfortunate..."

- The unknown soldier's first lines in Long Live the King

This unknown soldier first appears in S.O.S. and is seen listening in on Washington's S.O.S. call for help.

Role in Plot
In the episode S.O.S., this soldier discovers Washington's call for help after the Reds and Blues are left stranded in an unknown location, but the soldier doesn't respond. The soldier arrives to the teams location and appears in the episode Long Live the King, where he is seen spying on the Reds and Blues as they are in a feud.

Trivia

 * His armor in Halo 4 consists of a Locus helmet, Infiltrator torso, Engineer left and right shoulders and Outer-Plated arms.
 * The soldier arrives at the Reds' and Blues' location in the tenth episode of Season 11, similar to Tex who makes a bold appearance in the tenth episode of several seasons. Along with this, he is shown to have cloaking, an armor enhancement that Tex also had.
 * Many fans of the series refer to the soldier as 3G (Green Gray Guy).