Fleur was never treated too badly, all things considered. She had a roof over her head, a grandmother who loved her, and an infuriating half-brother who could barely take care of himself.
They may not of treated her differently, but the rest of the Southern Water Tribe did. Blonde hair and blue eyes, she was a tangible and constant reminder of what the Fire Nation had taken.
Maybe it's luck she ended up a waterbender and so it's easier for her tribe to accept her as somewhat part of them. She's never felt like she belonged though. Dreams of adventures and learning to waterbend plagued her across the entirety of her childhood.
But that all changed, when she and Sokka found a boy and his sky bison in an iceberg. Wearing lose fitting clothes, not at all designed for the chill of the poles, he stood out.
Holding his lethargic form in her arms, beautiful jade shines beneath newly opened lids. A jagged tattoo of a lightning bolt adorns his head.
"Who are you?"