Now that I think of it... there's one big plothole. Why the hell were Misha's parents cheering for her in chapter 1? Wasn't she supposed to be super neglected?
Arnos couldn't use revive on Misha because she isn't the original. However, thanks to Sasha's spell, "Dino Jiksess will no longer be able to differentiate between [them]", thus a revive spell would be able to target either one of them since they could both be the original.