Governor

Governor is a political position held by a human in a human government. A Governor is an appointed or elected official who holds executive jurisdiction over a planet, one or more of its states, territories, or districts.

The only known human governors are Nils Thune of the planet Harvest,, Jacob Jiles the leader of the rebel base at Eridanus Secundus, and an unnamed governor of the region of Castra in Madrigal.

Presumably, the leader of a group such as the Governors of Contrition would also be known as "governor".