Personality

Petra Leyte is a pure-hearted innocent young girl who often tries her best to help and nurture others, regardless of whether doing so was detrimental to her. Her sweet personality is enough to mellow the hearts of those who interacted with her, particularly Subaru and Frederica, whose moods brightened just from talking with her. Unlike many people in Lugunica, Petra harbors no xenophobic tendencies towards demi-humans, instead judging people off of their deeds and personalities. Alongside the other children in Arlam Village, Petra held no prejudice against Emilia.

She was originally a little submissive, usually just going along with what others said, however after the incident at the Sanctuary, she becomes bolder and learns to express her own opinion more. She also develops feelings for Subaru after he saved her during the Wolgarm incident. Before becoming a maid, her initial desire was to be a seamstress at the Royal Capital.

For someone so young, Petra is incredibly brave, choosing to prioritize the lives and wellbeing of others above her own in situations of crisis. When the disguised Wolgarm fled into the Wolgarm-infested woods, Petra, who was unaware of the creature's true identity, steeled her nerves and traversed into the forest to rescue the animal from danger. When Elsa Granhiert took her hostage and brought her before Subaru and her fellow maids, Petra, although terrified at the prospect of dying, told her friends to flee and save themselves rather than rescue her.
Re:Zero Wiki (SPOILERS AHEAD)

Voice

Petra is originally voiced by Erica Mendez in the dub. She has a sweet youthful femme voice, and is about 13 years old, so we are looking for a child-like voice.
Petra Dub Example