Ellen Anders

Professor Anders was a civilian passenger aboard the during the Second Battle of Harvest.

The fact that she does not possess a military rank indicates that she is not a permanent member of the Spirit of Fire's crew, and is a civilian scientific advisor to the ship and its captain. One of the early levels in the game involves rescuing Anders from a Covenant outpost. She appears on the battlefield as a hero unit similar to Sergeant Forge, though the effects she provides are unknown.