Lefebre was a Human man, a Starfleet officer assigned to the Federation starship USS Enterprise in the 2260s under the command of Captain James T. Kirk.
History[]
In 2269, Lefebre shrank along with the rest of the Enterprise personnel from exposure to spiroid epsilon radiation while orbiting Terratin. At the time, he was the third shift transporter engineer. As soon as he was returned to normal size with the transporter, he manned the station and proceeded to restore the rest of the crew. He also informed Kirk that a team of geology technicians beamed down with Montgomery Scott and Frank Gabler with mining equipment to replace the ship's fractured dilithium crystals. (TAS - Log Four novelization: The Terratin Incident)