A sharp, talented soldier in the Salamander Army, and later the commander of the Phoenix Army, Petra is one of the only girls in Battle School. She’s often singled out for being a girl, and seems to work extra hard in the battleroom to prove to her male rivals that she’s every bit as talented as they are. It’s suggested that Petra wanted to hurt Ender after he defeated her in battle, but in the end Petra becomes a loyal follower of Ender in his final battles.