Petra looked up to Levi Ackerman as a captain and cared deeply for her team. Petra was kind and caring, as shown when she looked after and guided Eren when he was first admitted to the squad. Although all of Levi's squad wished Eren's unconditional trust, it was ultimately Petra who convinced him to do so. Despite her kind nature, Petra was a conditioned soldier with a quick reaction time against perceived danger. She displayed extreme loyalty to her leaders as well.