He... was blaming her for this? Oh, that did it. Without even thinking, Katara took a giant step backward, removed her hands from her face, and brought them forward with a wave of water in front of them. Sending it surging toward Zuko, she all but screamed, "Don't you dare touch me, you big jerk! You did that on purpose and I know it!"
Now trembling with anger, she brought her hands back to her sides, the water swirling up and down her arms as she glared at him. "You haven't changed one little bit and you never will. It's all some big... game to you, isn't it? Make people believe that you're trying to do good only to hurt them as soon as they think it! You're horrible and I would rather be ripped apart by an entire hoard of demons than learn another single thing from you!"
Then she stopped, breathing coming in a pant and blood slowly starting to drip from her aching nose. Yet she made no move to wipe it away, or stave the flow, but instead continued to give Zuko the glare of death and silently dare him to even think about making another move near her.