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SUPPORTING CHARACTERS

None were Spartans, some weren't soldiers, and some weren't even human, but all were instrumental in completing whatever objective they had.

 
 

 

SEEKERS OF TRUTH

Doctor Catherine Halsey worked on many secret projects throughout her time with the Office of Naval Intelligence, but her most infamous one was the Spartan-II program, which would not have been possible without her involvement.  Professor Ellen Anders was considered as brilliant as Doctor Halsey by many, and her involvement in the Battle of the Etran Harborage and the Second Ark Conflict was the difference between defeat and victory. Rion Forge only wanted to find her father, but what she discovered was far greater than she could have imagined. Ben Giraud worked to expose the truth behind the Spartan-II program, but was met with fierce opposition.

 
 

 

ARTIFICIAL INTELLIGENCES

There are too many AIs in the UNSC to count, but these AIs are the most influential and likely smartest of them all. Cortana is well known for her abilities while working with John-117, and also her betrayal of humanity in 2558. Roland is loyal to the core, serving as the UNSC Infinity’s shipboard AI. Isabel was never designed to be a military AI, but has fit into the role easily due to her powerful intellect. Serina was possibly the smartest AI of her time, with much of her talents going to waste after the Spirit of Fire was left adrift. Black-Box may be the smartest AI of the post-war era, though his intelligence may well be rivaled by Cortana.

 
 

 

FORERUNNERS

The Librarian always liked to work from the shadows, and did so even after death, helping the Master Chief defeat the Ur-Didact 100,000 years after she died. The IsoDidact did not choose his role, but he accepted it and became the leader the galaxy needed in the last days of the Forerunners.

 
 

 

ANCIENT HUMANITY

Before our time, ancient humanity traveled the galaxy, creating a vast empire among the stars. Their empire collided with that of the Forerunners violently, starting a war that ended in the annihilation of the ancient human empire and the devolution of the species.