Librarian

Summary

The Lifeworker known as the Librarian (leader of all Lifeworkers) was a Forerunner without equal during their war with the Flood. A prolific Lifeshaper and wife to the Didact, the Librarian spearheaded the Conservation Measure--a massive effort to save all sentient life in the galaxy from the Flood parasite and the destruction caused by the Halo Array. Although she saved many species, she could not save herself—she became a victim of Halo while on Earth. However, her belief that humans should inherit the Mantle fueled her actions at the very end of the war, eventually helping the Master Chief gain victory over her twisted husband.