This Worf Star Trek The Next Generation T-Shirt features an image of Lieutenant Worf. Worf is a Klingon. If you doubt it, a demonstration can be arranged! Worf was the first Klingon main character to appear in Star Trek, and he was Lieutenant on the Starship Enterprise. Worf was passionate about helping his friends on the Enterprise as they would seek out new life and new civilizations. He was also passionate about the Mok'bara. Worf is one of the most popular characters in the Star Trek franchise!