Krelper was a gun smuggler working for Stotz. Krelper was well known for his complaining and inpatience. While waiting on Androzani Minor for a couple days to meet up with Sharaz Jek to deliver some guns, he complained to Stotz about the wait and Stotz scares Krelper by giving him a phony capsule that would kill Krelper but didn't. As the situation on Androzani Minor worsened, he and his fellow gun smuggler decided to cut their losses and depart for Androzani Major, leaving Stotz behind, but Stotz shot and killed them both.
Krelper and his men shooting at the Doctor, who escaped from Stotz's ship.
