Ursula Vaiken

Ursula Vaiken was a Phasoid who assumed the form of a human female, her real name was Tenebra.

She led the Eternal Imperium, which was based in the Unknown Regions, as a precaution against invasion.

Ursula also ordered the development of the Imperius-class Dreadnought, in order to be able to conquer the galaxy, and then beyond. Her ideals for galactic peace included the extinction of all life, luckily, her physical body was killed before she could go through with her plan.

Although her body was killed, her pure-energy presence was contained within a glass jar hung beneath a massive tripod-like walker, from which she could continue to rule.