Lieutenant Tylith was a 24th century Kasheetan woman, a Starfleet officer assigned to the Federation starship USS Titan.

In 2381, Tylith was on the Titan bridge when the ship was attacked by SecondGen Cyan-Gray. During the attack, Tylith hit her head on a console, causing a subdural hematoma. She would later die from the hematoma. (TTN novel: Synthesis)