Student at the Officers Academy and member of the Black Eagles. She hails from Brigid, a vassal state of the Adrestian Empire. A political hostage of the Empire, Petra is a highly intelligent, capable girl. Because of her foreign origins, she is not a native speaker of the Fódlan language and makes slight grammatical errors, but still wants to learn more. She is unaware of Fódlan colloquial speech and will often take idioms and figures of speech by their literal meanings.