Blues and Reds

The Blues and Reds are a group of terrorists who performed a spree of attacks ten months after the fall of Charon Industries, mistaken for the Reds and Blues. They are the main antagonists of Season 15.

Role in Plot
After the war on Chorus, the Blues and Reds attacked several UNSC outposts. Due to their similarities to the Reds and Blues of Blood Gulch, they were mistaken for the Reds and Blues during their terrorist attacks.

When the actual crew find them, however, the Blues and Reds explain that they're actually fellow simulation troopers from Project Freelancer who have been in hiding since they discovered that the UNSC have ordered the deaths of every single person involved with Project Freelancer. Along with the Reds and Blues, they fought off a UNSC attack before retreating beneath the surface to their underwater complex.

When Carolina and Washington reactivated their recovery beacons, they brought both Reds and Blues, and Blues and Reds to their location. After informing Wash and Carolina about the recent events, Temple lead Carolina and Wash to a chamber of the base, who both stared in horror at the frozen corpses and armors of ten Freelancer agents. They realized it was not the UNSC, but rather the Blues and Reds who are bringing down the Freelancers. Temple then proceeded to freeze both Freelancers.

Trivia

 * While the Blues and Reds appear to be copies of the Reds and Blues, featuring very similar members, they have no equivalent for Doc, Sister, Washington or Carolina, though Doc himself is a member.
 * Unlike the Reds and Blues, who primarily keep a standard Halo 5 M6H sidearm holstered, the Blues and Reds seem to have adopted M6H Tactical Magnum variant as their secondary firearm.