Tohna was a male human who served as a Commander in the Alliance Fleet during the Galactic Civil War. His ship was the Braha'tok-class gunship Apailana's Promise, assigned as escort to the troop transport Thunderstrike, which carried the Sixty-First Mobile Infantry. A short, muscled man, and former helmsman, he transferred to the Thunderstrike following the death of several of its bridge crew during the infiltration of the Thunderstrike. He served the vessel during Operation Ringbreaker, up until it was shot down at the Siege of Inyusu Tor.