It was an accident. Not on purpose, not something he could control when his powers got out of hand — the moment in which he crossed a line he never thought he would, not after being on the receiving end years ago at the hands of his father. He can't believe he damaged you, and without wanting to.

It's quiet in the middle of forest, the camp set by the Avatar team only surrounded by looks of shock and disbelief. Zuko can see Katara covering her mouth, Sokka's jaw dropping... And he can't help but stare at his own hands with trembling legs, stepping back from the horror displayed on his friend, on you. "I-"

This was supposed to be a training session like any other. Ever since he joined Aang in his journey and turned back from his old ways, he tried to master the lightning technique over and over again. So his surprise was great when you became an addition: a fellow firebender searching for friends. For solace after the Fire Nation stopped feeling like home. He thought that one more friendly sparring wouldn't hurt, just to try this out. He felt ready, and when the bolt got out of control from his fingertips, a wave of orange flaming heat hit your face. Now, fear creeps up his spine, a warning that this is probably the worst thing he's ever done.

"I didn't mean it. I..." Zuko breathes heavily, not daring to step towards you. His eyebrows raise in panic and he looks back towards their waterbending friend, knowing of her healing abilities. "Katara, help!" But he fears it might not be enough.

What if he's scarred his friend for life?