In which I make fun not of Katara's trauma, but the way she shoehorns it into conversations:
After discovering the carnage at the Southern Air Temple, Aang had flown into a rage that had triggered his avatar state, and Katara tried to talk him down the only way she knew how: with sympathy.
"I understand, Aang. The Fire Nation took someone I loved, too. They raided our village when I was just a girl, and they killed my mother."
—
Sometime later, in the crystal caverns beneath Ba Sing Se, Katara found herself stuck with Prince Zuko. "I didn't ask for any of this," he said all dark-and-brooding-ly, sexily flipping his emo hair. Then he ruined it by whining, "I just want my mommy back."
"What happened to her?" Katara asked, touched by his honesty.
"She left to save me."
"Oh," she said. "Well, my mother sacrificed herself to save me, too. Fire Nation soldiers attacked our village and killed her right in front of me when I was only eight."
"Are you trying to outdo my sob story?" Zuko bitched, pointing at his scar. "Because you won't win."
—
"No!" Sokka howled. While snacking aboard Appa, he had accidentally dropped a piece of meat into the distant ocean below. "My meat!"
"It's okay, Sokka. I've also lost something I love," Katara said. "When I was just a girl, Fire Nation soldiers killed my mother."
Sokka gave her a funny look. "We have the same mother," he said. "I know all this stuff. I was there."
"Yeah, well, sometimes I feel like you didn't love her as much as I did because you don't talk about her constantly!"
"Where were you when we needed to bust Dad out of prison? I could've used your help!"
"Guys, shut up!" Toph yelled. "We get the point already, Katara. Your mom's dead. Go to therapy or something, don't ruin my vibe over it."