Aloha~
I read that part where Nazuna was thinking about Soujicchi's character and the impression I get is that it really emphasises on the limit of her influence on Souji. The boy's problem is that deep down he's really somewhat of a male chauvinist and sees the fairer gender as targets to be protected
That's why Nazu-nee had wished that either Shiroe and Kazuhiko was around; compared to her, these two are the ones that Souji would have listened to without question =3