Now this is really interesting. Direct evidence that the black-haired heroine's companions are deliberately contradicting their previous morals and characters because...the shitfuck hero threw a bitchfit at a party?
We already know that the "prettiest" humans have such an overwhelming Cockroach blessing that there's effectively no such thing as complex strategy or tactics, whether it be personal combat or open war. I wonder if it goes deeper than that; the world is ruled by beautiful people because the Cockroach blessing destroys people's minds and renders them temporarily obedient whenever they are confronted by someone prettier than them. You can resist it (kind of - see page 10 of this chapter) if you're sufficiently self-aware of the bullshit to notice it happen, but the only way to refute it is to be so diametrically opposed to the Cockroach that you actively hate / despise / are antagonistic to it (see; scheming princess).