T'Preth was a female Vulcan in the 21st century, and was the helm officer under Commander T'Lera during their ill-fated observational mission to Earth in 2045. She was noted for her calm and soft-spoken manner, even in the face of disaster, and was also an accomplished linguist and artist. T'Preth was consort to Stell, the mission's sociologist, and both perished together as the vessel fell into Earth's atmosphere. (TOS novel: Strangers from the Sky)

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