Aren't you taking for granted that Natalia-chan was okay with sacrificing herself for someone else's sake?

If she's as selfless and altruistic as you say she is, wouldn't she at least have taken measures for the killer to not be executed for her death? If she and a killer had worked together, wouldn't she at least tried to make sure the person who so kindly helped her wouldn't die a horrible death mere hours later?

[Kizakura shrugs]

I just find a bit hard to believe she'd just let anyone die because of her, if she was willing to die for her kingdom.