If anything, the look on his face is...weary. He hunches a bit, conscious of the scar he'll forever wear on his back where she'd...well, killed him, for lack of a better word. Had it not been for Katara...

He sighs, shaking his head and looking back up at Zuko.

"Zuko, if I'm honest...I don't know if she can change, not really. I mean, I'd hope, but..." He pauses, collecting his thoughts. "Time and place can change people, I accept that readily - but with Azula...I'd need to see it. Really see it."

He pointedly doesn't answer the last question - mainly because Zuko can probably read the answer on his face. He's from further down the line, as it were - and things do not get better.