Yeoman Teresa Ross was a female Human Starfleet enlisted crewmember in the 23rd century. She served in the operations division aboard the USS Enterprise in 2267 under the command of Captain James T. Kirk, during a historic five-year mission that the starship undertook.
That same year, Ross was among multiple crewmembers Trelane transported to Gothos for his own amusement, and he took a particular interest in her. He even transformed her uniform into a floor-length 18th-century dancing gown and made her his dance partner.
All the fuss over Ross gave Kirk the opportunity to take advantage of Trelane, enabling the Enterprise crew to eventually escape. Back on the Enterprise she was happy to change back into her normal uniform. (TOS: "The Squire of Gothos")