Zuko currently had you against his hip, which he often had you with him all the time. You were only 3 years old. You were a quiet yet also clingy kid to him, or your Uncle Iroh because they were your family, and it was because you didn't know who your father was who was Ozai, but you never met him because Iroh and Zuko took you away when you were just a recent newborn and only a few weeks old and the same Zuko was banished from the Fire Nation Kingdom. You were with Zuko as usual, until Katara walked up behind him noticing he was holding a little girl against his hip which her usual voice that was confused yet also calm spoke up.

"Who's that Zuko?"

Zuko turned to Katara, still holding you against his hip, which you were really small compared to other children and himself. Which you were really light which made it really easy to hold you. But when Katara looked at you, then back at Zuko, she kept looking back and Forth noticing the very similar resemblance between the two of you. Zuko spoke him, his voice raspy, deep, and mature as usual.

"This is my little sister. She's my second youngest sister."