General Movar was a flag officer in the Romulan military during the 2360s. He acted as adjutant to Commander Sela.
In 2367, he helped Sela organize convoys of supplies to the House of Duras during the Klingon Civil War. He acted as Sela's aide during her command of a convoy fleet that faced off with a Federation blockade force commanded by Captain Jean-Luc Picard. (TNG: "Redemption", "Redemption II")
Movar was played by actor Nicholas Kepros. He and Velal were the only Romulan generals seen in Star Trek.
According to his profile from the script, "Movar is a smooth, polished... a political general rather than a combat veteran." This would seem to explain the unusual, unexplained professional relationship between him and Commander Sela, and why he takes orders from her, in "Redemption II." In addition, because Sela is half-Human, Movar may have been assigned to keep an eye on her.
Movar is the second of two TNG Romulan officers to wear the "double-strap harness" over his uniform, possibly indicating his flag rank. The first was Admiral Mendak in "Data's Day".