Yussef: I killed the American, I was the only one who shot at you. They did nothing... nothing. Kill me, but save my brother, he did nothing... nothing. Save my brother... he did nothing.
Richard: This is your fucked-up country, it's your responsibility.
Answer: Chieko was traumatized by her mother's death (and feels a great need for physical contact and affection) (though she (mistakenly) manifests this in a sexual way...not too unusual in young disabled people). Her father seems to suffer from this same horrific loss, which means that they're both stuck in a kind of "loss-limbo" (unable to satisfy either's needs). On the balcony, the two holding hands suggests the beginning of the "breaking of the ice" between them. BTW, her nudity-in that scene-has no significance. This is just a father and his child. I wish the movie-makers had given us a clue about that damned note. Though the secrecy of it does kind've suggest that it reflects her intent to end her life...even as her mother did. Her appearance in the nude to the cop (which, on the face of it, seems very erotic) challenges us to remember that people exist on "different levels" or expressions (or "ego-states"). The main thing is that she's calling out for affection and being comforted.