|Position|| Lieutenant commander
Doctor Ann Mulhall was a 23rd century Starfleet lieutenant commander, who served as an astrobiologist aboard the USS Enterprise.
In 2268, she allowed the energy being Thalassa to occupy her body while Thalassa's husband, Sargon, and their former enemy, Henoch, occupied the bodies of Captain Kirk and Commander Spock , respectively. This was done in order to construct androids where her consciousness and that of the other entities could be housed permanently. During this process, Thalassa almost refused to give Mulhall's body back, but ultimately did so.