Genau is basically what a stoic tsundere looks like. On the outside he stays cool as a cucumber, but he is aware enough to know that he has had to do some messed up shit and doesn’t want others to get their hands dirty like he has. He keeps saying how unaffected he is by his home village being destroyed, but he was certainly compassionate in dealing with his friend’s final moments, and cares a lot about their bodies being protected.