Why does Katara look pregnant in book three episode two the headband?

In "Avatar: The Last Airbender" Book Three, Episode Two, titled "The Headband," Katara appears to have a fuller figure because of the clothing she is wearing, which is styled in a way that can give that impression. Additionally, the animation style and the character designs may vary slightly from episode to episode. It's important to note that the show often uses exaggerated features for comedic or dramatic effect, which can also contribute to how characters are perceived visually at times.