Imperiatrix

Imperiatrix or Imperator was a title held by the leader of the Time Lords during times when the High Council was disbanded and the leader ruled in a more dictatorial manner. Imperiatrix personal guards were known as the Imperial Guard.

Pandora, the first female ruler after Rassilon (AUDIO: Imperiatrix, Lies) overthrew the Pythia, (PROSE: Cat's Cradle: Time's Crucible) took the title Imperiatrix as she exercised more power than her position allowed. The High Council deposed her and had her dispersed from history. (AUDIO: Imperiatrix, Lies)

Upon his election to the Presidency, Morbius similarly overthrew the High Council (TV: The Brain of Morbius) and declared himself the Imperator. (PROSE: The Book of the War)

In one possible reality caused by the influx of anti-time, Romana II held the position of Imperiatrix of the empire of Zagreus, keeping the Dalek Emperor captive, and threatening the Dalek race with destruction. (AUDIO: Neverland) In another possible reality caused by Pandora's influence and Darkel's insurrection, Romana held the position of Imperiatrix in a wake of a civil war, and she kept the Nekkistani Emperor and threatened to destroy the Nekkistani race. (AUDIO: Imperiatrix)

Madam President Romana temporarily took the title to prevent a newly resurrected Pandora from usurping her rule. (AUDIO: Imperiatrix)