That was the fastest I'd ever gone through two chapters of this manga. There was little more to them than the author pandering to himself and people who like vicious women like Regina:
(In chapter 32) "Who in the world is that woman?!"
Oh, nobody--just someone who attacked the city for
reasons not long ago, racked up a whole lot in structural damage expenses, and surely accumulated a casualty or two dozen--but we don't trouble ourselves over details, here.
(In this chapter) "You did one hell of a job!! The country will be safe with you around!!"
I couldn't help but wonder if the author was employing irony in his writing or not.
And, of course, all it'll take to get the coomers going over Regina is a tsundere act. Never mind how the murderous psychopath has nothing going for her but her figure (and even that's
easily overshadowed in this setting)
minus her face (that ugly mug--specifically her eyes--would tell any man with working eyes that she's someone you don't want in your life). I remember someone saying that the Japanese reamed the author for making her the main love interest or otherwise giving her massive prominence over the triplets in the source material; all of this gives credibility to that claim.
Yeahh but like why tho. The fuck is the point?
Probably to establish her character--and provide the first of probably multiple reasons why you should love such a psychopathic (and in this person's case, paraphilic) character, as was done with Regina. She'll probably be like Meryl, but with a sadistic streak as wide as Regina's lust for mindless, wanton destruction is deep.