That is so A+ fourth-wall breakage. MC saying "Let is settle this" to settle the chapter, instead of the fight.
What? You think he meant the fight? Nah, then it would have been a cliffhanger and not a 4th wall pun. Noone does annoying cliffhangers.
Kill her, and kill everyone else in there too. No point keeping those pests alive, when they can so easily be controlled by that waste of genes. And burn down the whole place afterwards, for good measure.
Pretty clear to me that he is not taking the brat's side, more using our MC to beat some sense into her. Saw her get OHKO when the MC wasn't going full on (sword sheathed) and decided he found the perfect reed to whip the brat into shape with.
Also get the feeling that the next chapter will jump back to what everyone else is doing because this manga seems to have a touch of ADD that way. Can't finish one story thread to it's conclusion before jumping away.
Kirika fucked up when spreading luring powder during a dungeon training run, tons of people die, Amelia kills the monsters and resurrects everyone, father wipes everyone's memory of the event and subsequently of Kirika in order to protect her from being crushed by the guilt, Kirika develops an inferiority complex towards Amelia(because their father thought she was too young to learn the truth and never told her, kept putting it off because she seemed so composed(TOTALLY MAKES SENSE RIGHT?)) and plots to usurp everything she has, Kirika proceeds to use her charm on literally everyone, including the King(who never realized it somehow) and Amelia(which is why she is so self-depreciative now), leads to Amelia getting labeled a criminal and exiled, no one is punished and Kirika and the King just say oops our bad once the charm is dropped and he reveals the truth of what Kirika did. Oh and the King didn't wipe Amelia's memory either which just compounds how monumentally stupid all the shit that happened thereafter is.
I haven't read the LN in a long time but this is how it went in the WN, so I'm gonna assume it's changed slightly at least, but its been pretty much the same so far so I wouldn't hold your breath for any major changes. Chapter 47 of the WN is where the manga is now if you want to just read it. Added some more to the spoiler because I forgot something important.
Amelia's class is Miko, she can literally channel the power of the gods and use god level magic. She kills all the monsters rampaging out from the dungeon with a massive AoE Gravity spell that was never seen before and then cast Mass Resurrection to bring EVERYONE who died back. Blah Blah Blah she lost her faith after being betraying by her family and its why she can't use those spells any longer iirc
the fuck? did they never question why the king didn't send anyone to save his "so precious" daughter? It's really stupid when the MC just go along and doesn't question anything.