"That's why we are accompanying him," Xia explained. "I also thought it was an odd trade, too good to be true even. Xin and I are going to make sure it doesn't get out of hand. I know he's grumpy, but my brother is invaluable should a fight break out."
Xin smiled slightly at the small praise given to him by his sister. He knew she was just saying it to try to encourage to be more enthusiastic about having to tag along, but a compliment was a compliment all the same. Especially so when he knew that is was true.