As an officer on the IKS Rotarran, Leskit fought in the Klingon-Cardassian War of 2372–2373. He came to respect the Cardassians as opponents, and appreciated that they fought for their people and followed a code just as the Klingons did. He wore a necklace made of Cardassian neckbones. However, Leskit grew cynical and pessimistic after the Dominion joined the war and the Rotarran endured a string of defeats at the hands of the Jem'Hadar.
Leskit was serving as the helmsman when General Martok took command of the Rotarran in late 2373. He was disdainful of Martok's apparent reluctance to engage the Jem'Hadar in battle, and incited a near-lethal brawl in the mess hall with Kornan by declaring that the Jem'Hadar were superior to the Klingons and that Martok feared them.
After Martok refused to cross the Cardassian border to rescue survivors from the IKS B'Moth, Leskit was prepared to lead a mutiny against him. He was preempted by Commander Worf, who challenged Martok for leadership. Martok's victory and renewed fighting spirit inspired Leskit and the others to rally behind him. (DS9: "Soldiers of the Empire")
Leskit was played by the late David Graf.
Leskit is a main character in the Star Trek: IKS Gorkon novels and was Keith R.A. DeCandido's first choice when deciding on characters from DS9 and TNG to include in the novel series. He commented: "Leskit was in fact my first choice. As soon as I started creating the Klingon crew, the absolute first person I wanted in there was Leskit because he was a snide, obnoxious Klingon, which is never simple. That really appealed to me, somebody who was that much of a wise ass and who was very much a Klingon. He walked around with Cardassian neck bones around his neck. So this was not exactly a friendly, happy wiseass Klingon". (Voyages of Imagination)