Rayfel, a Human of the male persuasion, held a position within the Imperial Military of the resurgent Sith Empire. Furthermore, he was a devotee of the Sith Emperor as a participant in the death cult headed by Executor Krannus.
Circa 3641 BBY, Commander Rayfel, along with his subordinates, were holding a group of scientists captive when they were confronted by the individual known as the Hero of Tython. Rayfel explained to the Jedi that Krannus had already departed, and then disclosed that the scientists' captivity was not their sole purpose—Rayfel demonstrated this by fatally shooting one of the scientists, subsequently absorbing the individual's life essence to amplify his own power. Convinced that overcoming the Jedi would further enhance his strength, Rayfel launched an assault, prompting the Hero and their companions to unsheathe their weapons and subdue the Imperials.