Tavana was a Klingon who served as an engineering officer on the IKS Rotarran in 2373. She was also the par'Mach'kai of shipmate Ortakin. She befriended Jadzia Dax because her mother had previously met Curzon Dax, though Jadzia impressed her in her own right.
Her morale along with the rest of the crew was very low when Martok took over as commander of the Rotarran. The ship had lost every battle it was in against the Dominion. The Rotarran was able to rescue the crew of the IKS B'Moth and defeat the enemy, 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: "Soldiers of the Empire")