She was always the perfect daughter. She never remembered a time when she wasn't, not until her own family betrayed her.
Dian had accepted her place in the Lagdameo clan with no protest. She started out apathetic about how Darryl was getting all the attention and how Dannah was all favored. But of course, you can't expect a little girl without much love to not seek for it and when her young life started to find justifications about her circumstance, she only got answers why Darryl had everything but not for Dannah having the same.
She knew how important being a male Lagdameo heir was, who wouldn't when you were born to a family where patriarchy was greatly recognized. And so, Dian kind of understands the significance of Darryl's role. However, she had no answers as to Dannah's privileges and so her early childhood hang-ups started with the question-What is with Dannah that she doesn't have?
If you want to remember what trouble L empire had in the par line that was mentioned in this chapter, you may want to reread Chapter 302. You'll better understand what that statement was all about.