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.
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.
- His name is a reference to Claude Errera (username Louis Wu), webmaster and administrator for halo.bungie.org, one of the most popular Halo fan sites.
- In Halo: Reach, one of the NPCs that can be recruited into Noble Six's fireteam is called C. Errera.
- Conversations from the Universe (First appearance)