The doctors at the mental asylum don't know how to deal with her. She is neither lost in her own world like the other patients are, nor does she scream threats and hurl profanity at them. Whenever they visit her, she is always the model of politeness, and the only thing that suggests the madness that hides beneath is in her eyes, which burn with a cold and implacable hatred that promises horrible fates if she is free.
Finally, Aang is called in to deal with her. At first it goes well. She pretends to be cooperative and expresses sympathy at Aang's situation as the last air bender. But this is all a trick. Once she learns of monk Gyatso, she reverse her position and taunts Aang on his fate.
"How naïve, you are trying to save me when you failed your master. You ran away and you betrayed him in the worst way possible. Pretend all you want that there was nothing you can do but know this. If you had been there, at least he wouldn't have died alone."
It is a low blow and she is glad to see Aang wince as if she had kicked him in the shins. Aang gives up on her and Zuko is called in to deal with the troublesome former fire nation princess. He asks her difficult questions like, "How could you suggest burning millions of innocent lives to the ground? Don't you think that it was wrong?"
"Shut up," she yells at him, "there is no need to explain myself to you."
It is her secret code for I don't know. But Zuko, that simpleton, has never been apt at decoding the messages of geniuses and blows up at her.
"What kind of monster are you?"
Once he comes so close to striking her that she flinches, reminded of her training session in Ozai. Zuko, seeing in her the same fear that was in his eyes the day of that fateful Agni Kai, stops his hand.
"I am not my father," he says and leaves. She never sees him again. She is ashamed to admit this but she almost misses him. Now she is truly alone.
