My apologies for the late response, I was on vacation. Yeah, you can feel bad for Sarah but it's still a funny and realistic moment I would say, that said, we are talking about Death end re;Quest 2 here, if this game is going to make you feel bad it will be for more than just a character crying. This is a dark and violent series, both games deserve the M rating...
It's funny because according to several sources Sarah is not dubbed by Brianna Knickerbocker, that said, her English voice actress may not be confirmed and who knows if she is voiced by Brianna in English and we just don't have an explicit confirmation. I can't deny that she sounds like Sleeping Beauty, Lucil/Svetlana, among other characters.
I'm sorry, but my answer is no, I'm not a Blue Archive fan and in fact I'm not familiarized with the music of Blue Archive, I've *barely* listened to the music of that game, I don't plan to do that video and I don't think I'll do it, sorry...