Petra is a veteran member of the Scouting Legion, and is one of the hand-chosen members of the elite Special Operations Squad under Lance Corporal Levi.

She looks up to Levi as a captain and cares strongly for her team, though notably at odds with Auruo.

Petra is kind and caring, as shown when she looks after and guides Eren when he is first admitted to the squad and seems to have acted as some sort of attachment figure for Eren among Levis Squad as she is the one shown to worry most about him as well as wishing he would rely and trust her and the others, and it is ultimately her who had managed Eren to do so. Whatever the case, Petra's words had a major impact on Eren.

Petra's Stats:

10 Solo Kills

48 Assist Kills

(Source: Shingeki no Kyojin Wikia)