So the Majin needed to kill the majority of the capital and fill their souls with resentment to manifest Lucifiria into her despite being strong enough the mc wasn't able to stop her from getting away, literally the only time someone has managed to do so in the series...
But now the Queen, who he has trounced repeatedly, can just have Lucifiria descend into her as a casual decision?
I'm not expecting Shakespeare here, but you could at least try to keep primary plot points from conflicting with each other...