Disclaimer: I don't own Avatar: The last airbender.
Katara laid on her bed, looking to the ceiling. Today has been a very weird day, not what she expected at all. The thing that worry her the most was how that guy with the scar on his face wanted to kill Aang. What was his name? Zuzu? Zugo? 'Why would anyone want to kill Aang? He seems nice. I don't think he could even hurt a fly' Katara thought, but than she remembered how Aang could see people's memories, their fears, their dreams, their everything... except hers. What made her so special from the rest of the world? She was just an ordinary girl, she has made her mistakes, like any person would. What made her have a wall to Aang's special power? Their had to be a reason.
"Katara..." she heard her brother's voice call her. She sat up on her bed and look at him, he was leaning casually against the door, "we need to talk."
"About what?" she asked puzzled,
"About Aang," Katara rolled her eyes and again lay on her bed, "I think he could be dangerous to us."
Katara chuckled, "He's not dangerous. If he was, he would have hurt us a long time ago." She couldn't even imagine Aang hurting her family, is just impossible!
"Katara, I don't want you to trust him-"
"Why not?" she asked forcefully, getting out of her bed and walking towards him with a powerful stride, "I could trust whoever I want. You can't tell me what to do."
"I can and I will. I am your big brother, and as your big brother I am responsible for your well-being and I don't think he is good for you."
"Good in what sense of the word? If you think about it Sokka you are not good for me either. You are lazy, hardheaded pig who has a big ego."
"What?" Sokka exclaimed. It has only been a day since that... boy came to the house and already he is changing Katara's point of view of him, her very own brother, "Listen, I don't know what he has tell you, but you never told me this before. He is changing you Katara!"
"He is not changing me Sokka! And I have been thinking that of you since... well, since I can remember. I just never told you because I never had the strength to tell you!"
Sokka looked at her puzzled, "He gives you strength?"
Katara paused and looked back at him, she gazed down to the floor and thought, "Yeah... I think he does."
"Well... that's good, I guess," Sokkay said thoughtfully, shifting his weight to each foot, "But... just think about what I said. Don't give him too much of your trust, you know what happen last time and..." Sokka paused, he walked to his sister and put his hand on her should, "I don't want to see you that way again."
Even though Sokka could be immature sometimes, he really cared about her. Katara smiled and hugged him, "Thank you Sokka, I love you!"
"Yeah, yeah, yeah," Sokka exclaimed, stepping away from the hug and fixing his shirt dramatically, "All in a older sibling's work."
I have no reason why this took so long, I'm just lazy. Sorry.