Star was born in Ba Sing Se to one of the richest families in Ba Sing Se; her expensive-looking clothing was a testimony to a life of wealth and privilege. While she and her friends tease each other about being soulless and lacking character, they were truly hollow inside. Star was arrogant, haughty, and inconsiderate. She and her friends were superficial, callous girls who enjoyed making fun of those they considered inferior.
As Star and her two friends were crossing a bridge in the Upper Ring of Ba Sing Se, they encountered Katara and Toph, who had just enjoyed a complete makeover at the Fancy Lady Day Spa. The three friends began insulting Toph's make-up, and her appearances in general, referring to her as a "clown" and a pet poodle monkey wearing a sweater. Although visibly upset by the remarks, Toph refused to be led away by Katara; instead, she turned to face the girls. Sarcastically laughing as she complimented Star on her witty "poodle monkey" comment, Toph asked the girls if they knew "what else [was] a good one". Without waiting for an answer, she promptly earthbent the ground from under the surprised girls, making them fall into the river beneath them. Katara finished with her own parting shot by waterbending the girls downstream, causing them to scream in terror.