These four Romulan officers served aboard the Khazara during its secret mission to the Kaleb sector. They worked on the bridge and two of them also participated in the dinner at the wardroom. (TNG: "Face of the Enemy")
This Romulan served as a centurion aboard the Khazara under Toreth in 2369. He was guarding the ship's cargo hold and was sent outside by Deanna Troi, undercover on the ship as Tal Shiar Major Rakal, when she wanted to inspect the secret cargo: Members of the Romulan underground movement defecting to the Federation. (TNG: "Face of the Enemy")
In 2369 he piloted the Romulan Warbird into the Kaleb sector at orders of Counselor Deanna Troi who was in disguise as Major Rakal aboard the ship. Loyal to Commander Toreth he later fired his disruptor at subcommander N'Vek and killed him. (TNG: "Face of the Enemy")
The following images are makeup continuity polaroids taken on the set in 1993. They're giving clearer shots of the four Romulan bridge officers pictured above.