She was the daughter of Tark, with whom she had appeared together since she had been a little girl, and was about to marry Morla. When the bar she danced in was visited by Kirk, McCoy, and Scott in 2267, Scott was very attracted to her, so Kirk asked her to come over to their table after the show.
Afterward, Scott and Kara walked through the foggy streets of the city. During their excursion, she was killed by the Redjac entity, which managed to frame Scott for her murder. (TOS: "Wolf in the Fold")