Roku was a wise and merciful Vessel with good intentions. However, he himself admitted that he was indecisive. Roku's old friendship with the previous leader of the Feudal Lands, Sozin Kuroashi, which became increasingly strained, prevented him from halting Sozin's imperial ambitions. This directly caused his death. Thus, he was unable to prevent The War, which could have been stopped after Unagi's time. He regards this as a massive failure on his part. Seireitou inherited the burden of rectifying the war-torn world. Roku firmly believed Seireitou was destined to redeem him.