The reason why the relationship between Mizi and Nanno was written in a weird way was because I wanted to show that despite the fact that they call each other sisters, they ironically wouldn’t have been friends if it wasn’t for Sua. If Sua didn’t bring these two together, I bet they wouldn’t be able too see each other’s perspectives and understand each other. Nanno would have been envious of Mizi’s beauty and hate her for existing. Mizi wouldn’t acknowledge Nanno’s existence for the sake of her mental health because she’s aware that people see her differently because of her appearance.
Now thank Sua for being these babies together.