Pelk was a friend to Fesek and the two had a good working relationship. Pelk knew his job and was experienced in life aboard a waste export vessel. He was also very artistic and built models as a hobby. He built a model waste export freighter as a present for Fesek's son's birthday, even though he enjoyed playing with the toy himself. Pelk had a wife named Sivad, although they didn't have any children together.
In 2375, the vessel he served on sprung a leak on a mission to export toxic waste. He and Fesek evacuated and were rescued by the USS Voyager. If the ship exploded it would destroy everything within three-light years. Pelk joined Fesek and an away team from the Voyager to try and seal the leak but was attacked and killed by a mutated core laborer named Dremk. (VOY: "Juggernaut")