After Aang and Zuko left, the others returned to their business – except Katara. She remained where Appa had flown off, with a rigid back and clenched fists.
After a while, she returned, face still stony.
"Katara," urged Sokka, "relax."
This was a mistake.
"How are you so calm?" she exploded. "How can you trust Zuko with Aang?" She went for her waterskin – Sokka drew back warily.
"Come on," Toph chipped in, "you really think Twinkletoes couldn't take Zuko?"
Katara glared, but quieted.
Sokka, for his part, knew Aang would come back, no matter what. It was just who he was.