Felix

"Holy shit. It's actually them!"

- The soldier upon discovering the Reds and Blues in Finders Keepers

This unknown soldier is first seen in Finders Keepers, looking down on Blue Team (and Simmons) from a cliff. He seemingly knows the Blood Gulch soldiers and intends to help them.

Role in Plot
The soldier spots the Reds and Blues from atop a cliff and appears surprised to see them and recognizes them. He later catches a brief glimpse of Locus cloaking, which seems to trouble him. Afterwards, the soldier heads to Red base and speaks with Lopez 2.0, where he informs him that he will get the group out soon. He also adds that someone else is watching them before leaving, startling Lopez 2.0.

The soldier takes on a more active role in Neighborhood Watch, saving Washington from a bullet to the head, courtesy of Locus, by activating a Hardlight Shield. Unfortunately, Locus, using his sniper rifle wounds him in the leg. During a brief standoff between the Reds, Blues, and Locus, he seems to display a high level of aggression towards Locus, calling out several profanities before being told to shut his mouth by Locus. After Locus disappears, he asks the teams if they know how to patch up a leg, prompting Doc to leave to get the orange juice, with the soldier saying "Wait, that's a thing?"

Trivia

 * Fans of the series most commonly call this soldier Orange Guy due to the orange trim on his armor. However, he has several other popular fan nicknames, such as DOG (Dude with Orange & Gray), MOGG (Mysterious Orange & Gray Guy), Sunkist (as his armor color is similar to the same named soda product), and Scout (as he wears a Scout helmet; similar to Locus having a Locus helmet).
 * His armor consists of a Scout helmet, a Soldier torso, Venator right and left shoulders, Twin-Plated forearms, XG-89 Narrow legs, and midnight visor.