She's been disillusioned & is now not as naive as she used to be. She became very angry &, for a while there, I was afraid she'd Lost her sensitivity but, she seems to be getting past that anger now & can still empathise with people.
She's hurt and guarded. She's built an emotional mur to protect herself. I think she wants it to come down, but it's going to take a special person (hopefully Rigsby hint*hint*) to get inside and help her heal and trust people again.