At the point where the five teens are in the process of sneaking out of Sharalidor with Aremktesh and his son, Justin decides he really wants a fight and attacks the guards, leading to the deaths of Aremktesh and his son. This seems like a random Idiot Ball; however, in the end, when we learn that the teens' bodies in Xhandarre were designed by Avron Kromar, it becomes clear that not only their weapons, but their character traits, were designed to serve Avron Kromar's purposes. Thus, Justin's berserker nature asserting itself at the worst possible time for the teens was just what Avron Kromar needed to prevent them from gaining inconvenient allies.
