Why does the mangaka want the blonde woman to think of the dark-haired character as "fragile", whatever that means, and "innocent" in order to feel attracted to her?
It seems to me that it's the blonde woman who is fragile and innocent.
And then the mangaka thinks it's important to portray the dark-haired woman as insecure and tearful.
This mangaka really can't hold a story or a character. Her portrayals are unrealistic and all over the place.