Yeto was a male Klingon mercenary who worked for Verad Kalon in 2370. His partner was T'Kar.
Yeto travelled with Verad, T'Kar and Mareel aboard the Ekina to Deep Space 9, where his Trill employer wanted to remove the Dax symbiont from Jadzia Dax.
While on the station, he was tasked with guarding Julian Bashir in the infirmary, but eventually was knocked out by Bashir. (DS9 episode: "Invasive Procedures")