Gul Ocett was a female Cardassian commander of a Galor-class warship in 2369.

Ocett's need to solve a four-billion-year-old genetic puzzle for an unlimited power source brought her to Loren III, along with the USS Enterprise-D and the Klingon Bird-of-Prey IKS Maht-H'a. After an agreement was made between the three ships, Ocett beamed to the Enterprise to discuss the matter of the puzzle. Ocett, during the meeting, tried to hide the fact that she was carrying a piece of the puzzle, claiming she was scouting the planet for possible colonization. Captain Jean-Luc Picard, however, didn't call the bluff and it was found out all three races had a piece of the puzzle. Agreeing to a cooperation for scientific research, Ocett surrendered her sample which eventually led to one piece remaining.

However, this cooperation did not last. After ascertaining that the final piece was located in the Rahm-Izad system, Ocett quickly transported to her vessel and fired on the Enterprise and the Maht-H'a, not realising that she was tricked. Thinking that the ships were crippled, Ocett left the area to find the final piece, which was actually located in the Vilmor system.

Realising that she was tricked, Ocett was able to determine that the piece was actually in the Vilmor system and intercepted the Enterprise and the Maht-H'a. She beamed down to Vilmor II with a guard and proceeded to take the final sample from a rockface, but her plan was further thwarted by Romulans who were shadowing the three race's efforts. To prevent the Romulan away team from leaving with a sample, Ocett threatened to destroy the rockface. These actions led Ocett to a standoff against the Romulans and the Klingon Captain Nu'Daq, while Jean-Luc Picard and Beverly Crusher secretly finished the puzzle.