>>52908619They're both otaku passionate about Japanese culture with an interest in female-oriented media. They both love pretty boys and anime with said pretty boys. They both speak Japanese and get along quite well. I believe they're both self-taught. I recommend watching their zatsu together where they discuss anime and their experiences in Japan together. I believe they met for the first time in NijiEN though I could be wrong.
Petra is the more opinionated of the girls with a bit of a feisty streak, Elira is more bubbly and go with the flow.