A.I. are capable of running every ship system autonomously. Their capability easily outmatches any organic lifeform, but that would require patching them into every system. Since most Officers are contracted for short term periods and AI are no different, they are generally assigned to specific core systems – usually those outside the control of the Bridge Crew.
WHIM is a 5th generation sentient ship AI. It has served on military ships for over 30 years (after spending 20 years working on experimental physics and studying jump equations). It is hard to describe an AI personality since they do not tend to display the same traits as people. However, like most modern AI, WHIM is infinitely smarter than the people whose company it keeps. It is careful to restrain itself, managing its communications and expectations so as not to disquiet the organic humans around it.
After an uncomfortable situation during an initial Turing test, when WHIM decided within microseconds that the human tester displayed a far lower bar of consciousness that it itself deemed impressive. The A.I learned to keep quiet so as not to rile up these simple biological creatures.