High Mistress of the Republican Senate of Rannoch and her Colonies
Allegiance:	Greater Quarian Republic New Quarian Republic
Date:	Old Republic: 17 October 79 CE - 10 April 1896 CE New Republic: 25 June 2188 CE - present
Incumbent:	Mifi'Vufin

The High Mistress of the Senate (styled High Mistress of the Republican Senate of Rannoch and her Colonies), and also known as the High Mistress of Rannoch, is the female speaker and advisor to the Prime Candidate in the Senate of the Republic. The role was present in the both the Old and New Republics of Rannoch, and is one of the two most powerful positions of authority within the Senate, second only to the Prime Candidate themself. The position of High Mistress is often chosen through a vote in the Senate, and once in that position, the High Mistress acts an advisor to the Prime Candidate on both military, economical and political matters, while also acting as a speaker of the house, and will, on occassion, assume the role of Acting Prime Candidate or speak for the Prime Candidate in their absence, depending on the vote of the Senate. 

The most recent High Mistress by 2910 CE is Mifi'Vufin.