A prominent figure in the field of Arts, Brianus Ezra became an activist in primate liberation after completing their tenure at The College of Essex. Having always lived within the Doctor caste, Brianus was raised in an environment of empathy and good will, and those values led them to join the Critical Earth Expedition. Now, as their mission leads them to Earth, Brianus and the Doctors are dedicated to the liberation of the primates in captivity there.