Reptor highly valued political power, seeing it as the ultimate means of progressing in life and an absence thereof as a sign of weakness which ensures a certain doom for those without. His actions in seeking to claim Grannvale for himself were entirely motivated by feeling his own power and prestige among Grannvale's nobility was threatened by the rise of Kurth and Vylon, and that eliminating them would secure his ongoing place in the world. His greed for power made him easy for Arvis and Manfroy to manipulate, and yet while he was paranoid of being betrayed by Arvis, he nonetheless resigned himself to taking Arvis on face value with no other recourse, only for his suspicions to be confirmed in the end.

Think emperor palpatine.