Jora and Bjorn must always be in the same unit if they join one. As long as both Jora and Bjorn are alive, they have Immunity (Psychology). Roll a D6 for each Hit Jora suffers, on a 4+, Bjorn steps in to protect her; resolve the Hit against him instead. If Jora is slain, Bjorn becomes Frenzied and Unbreakable. If Bjorn is slain, then Jora becomes Unbreakable and Hates the unit that killed him.