Ty Lee had always been different from the rest of her sisters. She may have looked like them, but her personality was far from similar to those of her siblings.
So when she had decided to run off to the circus, her parents were not surprised. They visited her, once, watching their daughter balance herself on a thin rope while standing on her hands. Ty Lee had smiled at them from above, but did not receive a smile in return. Instead, her parents had solemn looks; saddened that one of their daughters would not be marrying a nobleman.
When Ty Lee had returned to the Fire Nation along with Azula, Mai, and Zuko, her parents were ecstatic. Now was the perfect time for them to get their daughter back and have her find a son of rich noblemen to get comfortable with and later marry.
It was, however, no surprise to them when Ty Lee had refused that option, and decided to stay with the princess and her friends to prepare for the Solar Eclipse.
Years had passed, most of Ty Lee's sisters had settled down with rich ambassadors and noblemen, and her parents were disappointed to see that Ty Lee was still a contortionist hanging around with the princess, and not a rich Fire Nation wife.
Ty Lee was shocked that her parents were surprised to find that their daughter had fallen in love with the princess. After all, Ty Lee just had to be different.
This one was supposed to be like 6. Princesses, but I don't like this one as much.