Yeoman Tonia Barrows was a female Human Starfleet enlisted crewman who lived during the mid-23rd century. She served in the operations division aboard the USS Enterprise under Captain James T. Kirk, during a historic five-year mission that starship undertook.
In 2267, Barrows was one of several landing party members briefly trapped on the surface of the Shore Leave Planet. While there, she was accosted twice by recreations of legendary rake Don Juan. She found a dress, exactly the sort she imagined a princess of the "blood royale" might wear.
When McCoy returned to the surface, from where he'd been taken for medical care, she took umbrage to a pair of Rigelian chorus girls he brought with him. His apologetic "After all, I am on shore leave" brought him a frosty "And so am I." (TOS: "Shore Leave")
Tonia Barrows was portrayed by actress Emily Banks. Her first name was not given in the episode's dialogue, but was mentioned in the installment's script and end credits.
According to a comic book issue of DC's TOS volume 1 series (#56), Barrows eventually earned a promotion to lieutenant, and served aboard the USS Defiant, although she was injured and left the vessel before the events chronicled in "The Tholian Web".