C. Errera

Corporal C. Errera was a non-commissioned officer in the UNSC Marine Corps who served as a sniper spotter. He was present at the Fall of Reach during the Human-Covenant War, where he was killed in action.

Biography
He intercepted a conversation between two Unggoy soldiers, including Mehmep. The soldiers talked of the tension between the Sangheili and the Jiralhanae within the upper levels of the Covenant government, also speaking of a Jiralhanae chieftain named Bracktanus.

Trivia

 * His name is a reference to Claude Errera, (username Louis Wu), the webmaster and administrator of halo.bungie.org, one of the most popular Halo fan sites.
 * In Halo: Reach, C. Errera is one of the NPCs who can be recruited into SPARTAN-B312's fireteam.