Ellen Anders

Ellen Anders was a brilliant Professor who was rescued from the planet Arcadia by the Spirit of Fire, which is lucky as she just so happened to know the Captain, Gregory Cutter, so she was able to rent a room on his ship. She converted the observation platform of the ship into her laboratory, and she continued her experiments until she was kidnapped by the Covenant above the Flood-controlled Shield World.

After being questioned by the Prophet of Regret, Anders was saved by Red Team and escorted back to the Spirit of Fire. There she continued to aid the UNSC forces in their tactical annihilation of the Covenant and the Flood, especially by modifying certain UNSC vehicles so that they will function better. After spending some time in cryosleep following their victory, Anders returned to Earth along with the rest of the Spirit of Fire's crew, apart from Sergeant Forge.

She would often argue with Serina over who was the cleverest on the Spirit of Fire. They both agreed to disagree on the matter, but Serina constantly reminded Anders that she controls every system on the Spirit of Fire - including life support.