Jack Twist and Ennis Del Mar
While Jack matches Ennis in so many ways, their differences cause them to butt heads more than a few times, which only serves to highlight the doomed nature of their affair. Jack stresses their differences in their last argument, claiming, "I'm not you. I can't make it on a couple a high-altitude fucks once or twice a year. You're too much for me, Ennis, you son of a whoreson bitch" (117). Yeah, emotions run high with him, and they definitely don't with Ennis. Which is a huge part of why these two can't ever be together—Ennis is afraid to let go, and Jack can't keep from holding on.