Seret

Seret was the name used by a Romulan agent of the Tal Shiar while impersonating a Vulcan nurse aboard Deep Space 9.

In 2375, while on DS9 she was part of the medical team that took care of the victims of the "Vulcan scourge" from the Damask Plain. While investigating cures for the disease the medical staff discovered that Seret was actually a Romulan, and that Romulans were immune to the disease allowing them to create a cure. Afterward, they allowed her to stay on the station as a medical technician. (SS DS9 (Mirror Eyes))