For those who go with Petra, an awkward thing I found out is that Petra's Japanese VA, Shizuka Ishigami, also does adult visual novel voices under the pseudonym Mei Hanazono. No judgment against the seiyuu's career obviously, and power to her choices. She does a great job with Petra. Since Petra is a relatively innocent character in the game, it just made me blush when I found that out.