Tavana was a female Klingon who served as an engineer aboard the IKS Rotarran in 2373. She was also the par'Mach'kai of her shipmate Ortakin. Tavana befriended Jadzia Dax because her mother had previously met Curzon Dax, though Jadzia impressed her in her own right.
Tavana's morale, along with the rest of the Rotarran crew, was very low when Martok took over as commander as the starship had lost every battle in which it had fought the Dominion. After being assigned by the Klingon High Council to locate the IKS B'Moth, the crew of the Rotarran were able to rescue thirty-five survivors from IKS B'Moth and defeat a Jem'Hadar fighter, revitalizing the crew. Tavana and the rest of the crew of the Rotarran would become one of the best crews in the fight against the Dominion, and became Martok's flagship. (DS9 episode: "Soldiers of the Empire")
By 2379, Tavana held the rank of captain and was in command of a fleet patrolling the Pheben system. Rov, a member of the Klingon rebel group Klahb, used Pheben V to broadcast a message to the entire Klingon Empire. Rov revealed that Emperor Kahless was a hologram and he blamed the Federation for the deception. Rov also demanded that Chancellor Martok step down and that the Empire end its alliance with the Federation. Martok ordered that the transmission be ended immediately and Captain Tavana was able to destroy the only energy source on the planet. It was unclear whether Rov was using a relay station or simply a recording, but his body was never found. (TNG novel: A Time for War, A Time for Peace)