Yeoman third class Tina Lawton was a female Human Starfleet enlisted crewmember in the 23rd century. She served in the sciences division aboard the USS Enterprise in 2266 under the command of Captain James T. Kirk, during the historic five-year mission. She was born in 2249.
In 2266, Lawton was introduced by Yeoman Janice Rand to Charlie Evans, a seventeen year-old man whom the Enterprise was transporting to Earth Colony V. Rand had been made to feel uncomfortable by Charlie's affections, and introduced him to Tina in an effort to facilitate his association with a woman of his own age. Charlie rebuffed Tina, however, wanting to further pursue a relationship with Rand. Later, out of frustration with the Enterprise crew, Charlie utilized incredible psychokinetic abilities granted to him by the Thasians to transform Tina into an iguana. Along with all of the other crewmembers affected by Charlie, Tina was restored by the Thasians when they arrived to retrieve Charlie. (TOS: "Charlie X")