Well, in Kirstin game she understand, the errors of her way, and changed in the end... Errors that were never really shown in her game... Reminiscence is a PREQUEL, and, if I understand well, it's chronologically the first game of the series, the Kirstin here is still the War Demon Kirstin, and the author gave a pretty good explanation of her reasoning during this game...She is The War Demon here afterall, she only knew war and cruelty, in her twisted mind, what she did was a good thing. And the author reasoning seemed to work very well, seeing the popularity votes! Her redemption arc is her own game, that was released before this one, but happens chronologically later, which is weird, I know, but that is how prequels work.
What? Non canon scenes are always well accepted!!!! Kids this days not appreciating the best qualities of the amazing Taimanin saga, the WhatIf scenarios!!!!