A "Half-Klingon" refers to a character who is of mixed heritage, specifically one parent being a Klingon and the other being a human. This unique background often results in a blend of physical traits and cultural influences from both species, leading to a complex identity. In the Star Trek universe, half-Klingons may experience challenges related to their dual heritage, such as acceptance within Klingon society and the human world. Notable half-Klingon characters include B'Elanna Torres, who serves as a chief engineer on the USS Voyager.