Commander D. Nhan was a female Barzan who served as a Federation Starfleet officer in the 23rd century. Aboard the USS Discovery, she traveled to the 32nd century and subsequently assumed responsibility for the USS Tikhov.
Serving on the Enterprise
By the late 2250s, Nhan was serving as an engineer aboard the USS Enterprise under Captain Christopher Pike, holding the rank of Commander. Being Barzan, Nhan relied on an augmentation to be able to breathe in the atmosphere maintained aboard Starfleet ships. (DIS: "Brother", "Project Daedalus")
Serving on the Discovery
Along with Evan Connolly, she accompanied Captain Pike onto the USS Discovery when the Enterprise suffered a malfunction. She was also a part of the team that investigated the crashed wreckage of the USS Hiawatha. (DIS: "Brother")
Nhan became suspicious of Airiam when she asked about the Barzan's breathing apparatus. Nhan continued to observe Airiam as Discovery approached Section 31 Headquarters. When Airiam requested to join the away team, Nhan told Pike that she would "look after" Airiam. While Nhan, Airiam, and Michael Burnham were aboard the space station, the Discovery crew learned that Airiam's cybernetic components had been corrupted by Section 31's threat assessment system, Control, in an effort to access the Sphere's data. Nhan and Burnham confronted Airiam, who ripped one of Nhan's breathing augmentations off, leaving her gasping to breathe. Burnham trapped Airiam in an airlock, but hesitated to blow her into space, despite pleas from Airiam and an order from Pike. Nhan ultimately regained consciousness and ejected Airiam into space, killing her. (DIS: "Project Daedalus")
When it was decided that Burnham would take Discovery forward to the 32nd century to prevent Control from seizing the Sphere data, Nhan volunteered to stay on board Discovery. Despite knowing that there would be little chance of return, she believed that she owed it to Airiam for the latter's sacrifice. (DIS: "Such Sweet Sorrow", "Far From Home")
Nhan helped Philippa Georgiou in neutralizing Leland (who had been reanimated by Control), when Leland boarded the Discovery to take the Sphere data. After the Discovery disappeared from its original timeframe, Nhan, along with the rest of the volunteering crew, was presumed dead by Starfleet, based on the testimonies of the USS Enterprise senior officers. (DIS: "Such Sweet Sorrow, Part 2")
Upon Discovery tracking down Federation Headquarters in the 32nd century, they needed to locate a seed sample from the seed vault ship USS Tikhov. Nhan learned that the Barzan joined the Federation in the 25th century, and was responsible in a member rotation for crewing the Tikhov. Nhan, Burnham and Dr. Hugh Culber beamed aboard, allowing Nhan to breathe a Barzan atmosphere, hear the Barzan language, and see a Barzan for the first time since she had joined Starfleet. When the sole surviving Barzan aboard, Dr. Attis, needed to be taken for treatment, Nhan volunteered to serve as her world's representative and crew the Tikhov, with the intention of seeing that Attis' family receive a proper burial on their homeworld. (DIS: "Die Trying")
- Prior to 2257: Assigned to USS Enterprise as an engineer
- 2258: Along with Discovery's crew, travels to the 32nd century
- Arrives with Discovery's crew
- Takes responsibility for USS Tikhov
"I see where the Federation puts its pennies."
"Do not covet thy neighbor's starship, commander. Besides, we've got the new uniforms."
"And lovely uniforms, they are. Captain."
- - Nhan, Christopher Pike, Saru, and Michael Burnham on the Discovery and new Starfleet uniforms (DIS: "Brother")
"Nhan. Security officer, USS Discovery. SFB534-0679."
"Failure to comply is insubordination."
"Now, how long was the durat–"
"Nhan, D. Security officer, USS Discovery. Throw me in the brig, hologram."
Nhan was portrayed by actress Rachael Ancheril.
When Nhan was aboard the USS Enterprise, she wore a red shirt uniform. However, after joining the USS Discovery's crew she began wearing their signature blue uniform but with a skirt, though her skirt uniform differed from that of Star Trek: The Original Series by not showing her legs. She wore black boots that went up past her knees and any time skin between the boots and the end of skirt was seen, that skin was covered by thick black leggings to make it appear like she was wearing pants underneath the skirt.