I honestly saw this coming for quite some time. The first time she had the dream and remembered the name “Jun” it clearly showed a girl in a japanese high school outfit aswell as the fact Jun is very much not a name like that of the ones in the European style world they’re in. I initially wasn’t quite sure if Louisa was Jun or not, but as the chapters went by and the connection between Jun/Louisa and the demon lord became more clear I became quite certain they were the same person. At least I can say the actual reincarnation and Maou story wasn’t expected, or at least I didn’t predict it being something like that. It kind of feels like one of those “revenge” isekais except from the eyes of the normal inhabitants rather than the betrayed hero, I’m very interested, even more so than when I first started the series.