(covers information from several alternate timelines)
Jae was a 24th century Starfleet officer, who started her career on board the USS Enterprise-D as an ensign, usually serving in the operations division beginning around 2367. By 2369, she held the rank of lieutenant junior grade. (TNG: "Reunion", "Rascals")
Jae was on the bridge when the Enterprise-D encountered the Cytherian probe in the vicinity of the Argus Array; she received new orders from Lieutenant Worf shortly thereafter. Later she was working in engineering when La Forge passed her on his way to the holodeck. (TNG: "The Nth Degree")
She was working on the lowest level of the warp core after Geordi La Forge returned from his trip to Risa. She was later on duty in the transporter room beaming Governor Vagh and Ambassador Kell aboard the Enterprise-D. Jae was also part of the forensic team which searched for DNA samples on weapons containers in cargo bay 4 shortly before the assassination try on Governor Vagh. (TNG: "The Mind's Eye")
In 2368, Jae was seriously injured when the Enterprise-D struck a quantum filament. She was brought to Ten Forward for treatment, since the rest of the ship had been cut off from sickbay. (TNG: "Disaster")
Sometime between 2366 and 2368 she was one of the engineering crewmembers who were evacuated from the main engineering due to a warp core breach. Commander Riker experienced this event during a telepathic memory invasion by the Ullian Jev and remembered the death of Ensign Keller. (TNG: "Violations")
Jae was on duty on the bridge when the ship was infected by nitrium parasites the same year. She passed out on the bridge and had to be led to sickbay when the ship had to overheat in order to kill the parasites. (TNG: "Cost of Living")
Jae was also on duty on the bridge when Captain Jean-Luc Picard lost consciousness as he was affected by a probe sent by the long dead inhabitants of Kataan, (TNG: "The Inner Light") and when the ship was in orbit of Devidia II a short time later. (TNG: "Time's Arrow")
She was also on duty when the Enterprise-D came to the rescue of the transport ship Dorian (TNG: "Man of the People") and a few days later when the crew found the Dyson sphere that the USS Jenolan had crashed on. (TNG: "Relics")
Jae attended Data's poetry reading in early 2369 and sat next to Captain Picard and Lieutenant Worf. Data's poetry was less than inspirational, but she was polite and stayed for the entire reading. (TNG: "Schisms")
Jae manned her aft station on the bridge when Captain Picard, as a teenager, entered the bridge and made orders. She was astonished by this circumstance. Later she was among the bridge crew, who was held hostage by the renegade Ferengi. (TNG: "Rascals")
She was back on the bridge when the Enterprise-D under the command of Captain Edward Jellico faced the Cardassian Gul Lemec and when Captain Picard returned to the Enterprise-D. (TNG: "Chain of Command, Part II")
Jae was on duty on the bridge, walking towards the Environmental Station when Lieutenant Commander Data announced to Captain Picard that he had completed his spectral analysis of the outer shell of a protostar. (TNG: "The Chase")
Jae was one of many Enterprise-D crewmembers to beam down to the rogue Borg planet in search of Data, and was one of the first to return to the ship once the Enterprise-D began retrieving the search teams. (TNG: "Descent, Part II")
Jae served on an aft station on the bridge when Captain Picard and Doctor Crusher were held hostages by the Kesprytt (TNG: "Attached") and when the two scientists Serova and Rabal beamed aboard the Enterprise-D. (TNG: "Force of Nature")
Jae was on duty at the bridge when the Enterprise-D arrived at Boraal II after it received the distress call from Nikolai Rozhenko. She remained on the bridge and was present when Captain Picard held his speech to honor the Boraalans. (TNG: "Homeward")
In 2370, Jae was part of the beta shift, which began duty at 1200 hours. Commander Riker and Ensign Gates also worked this shift. Before and after she served in this shift, she joined fellow crewmembers in Ten Forward, had a drink with Ensign Kellogg, and played a game of Terrace against a science officer. (TNG: "Lower Decks")
She was later passed outside Ten Forward while talking to a male friend by Data and La Forge after they installed Data's emotion chip. She later appeared in Ten Forward talking to the same gentleman. Later, Jae consulted with the relief operations officer on the Enterprise-D's bridge when a quantum implosion occurred in the Amargosa star from a solar probe launched by Tolian Soran from the Amargosa observatory.
During the battle with the Duras sisters, Jae was hit by debris, requiring Deanna Troi to take the conn. She returned to the bridge just as the saucer section began its descent towards Veridian III. (Star Trek Generations)
Jae was one of Jean-Luc Picard's old crew that transferred to the USS Enterprise-E in 2372. She was then in the sciences division, and on duty for the Enterprise's involvement in the Battle of Sector 001 in 2373. She was one of the officers on the bridge while the Borg began to assimilate the ship and worked on weapons modifications under the supervision of Doctor Beverly Crusher. (Star Trek: First Contact)
- "Final Mission"
- "The Loss"
- "Data's Day"
- "The Wounded"
- "Night Terrors"
- "The Nth Degree"
- "Half a Life"
- "The Host"
- "The Mind's Eye"
- "Silicon Avatar"
- "Unification I"
- "A Matter of Time"
- "New Ground"
- "Hero Worship"
- "Cause and Effect"
- "The First Duty"
- "Cost of Living"
- "The Next Phase"
- "The Inner Light"
- "Time's Arrow"
- "Time's Arrow, Part II"
- "Realm of Fear"
- "Man of the People"
- "True Q"
- "The Quality of Life"
- "Chain of Command, Part II"
- "Starship Mine"
- "The Chase"
- "Rightful Heir"
- "Second Chances"
- "Descent, Part II"
- "Dark Page"
- "Force of Nature"
- "Sub Rosa"
- "Lower Decks"
- "Eye of the Beholder"
- "Preemptive Strike"
- "All Good Things..."
Jae was played by regular TNG background actress Tracee Lee Cocco. She was generally seen at the environment station on the bridge, although she also made frequent appearances in main engineering, the corridors, and Ten Forward. She seemed to be very comfortable with both Captain Picard and Commander Riker; she sat closely to Picard in "Schisms" and, in "Inheritance", Riker had his arm around the back of her chair during Data and Doctor Tainer's concert.
Cocco's official site  claims the character was named "Jae", and this is maintained here, although no official production source has named the character. In an interview on Trek FM's Earl Grey podcast, Cocco stated the name was created accidentally, on set, by Commander Riker actor Jonathan Frakes, and had just stuck. The part she played in the "Unification" two-parter was referred to in Jeri Taylor's novelization of Unification with the name "Gretchen Naylor (β)", although the description of the character didn't quite match Cocco's appearance.
Jae's name appears on an autograph card released by Rittenhouse Archives.