High Leader

Within the female-led Covenant remnant faction Opposition, the title of High Leader was created by Zexi 'Nrahom as she founded the Opposition to oppose the Covenant Loyalists during the Great Schism.

As High Leader, Zexi was recognized as the Opposition's de facto, commanding all of its forces as well as being the leader of the Opposition High Council, a body of both military and political members.

Trivia

 * The High Leader's symbol is actually the emblem of Sienna Khan from Rooster Teeth's web-series RWBY.