Sienna was raised solely by her mother, Amelia, and grew up in the countryside. The first time she arrived at the Sterling residence, she wore well-worn clothes stained with dirt and clutched an old rabbit plush toy in her arms, creating a stark contrast against the opulent mansion in Beverly Hills. After she was gradually accepted into the family, her wardrobe shifted to neat, soft children’s dresses, knit sweaters, lightweight jackets and comfortable leather shoes. Even so, her style never abruptly transforms into that of an overly ornate, pampered little heiress.
Following Molly’s scalding accident, prominent treatment scars remained across Sienna’s back. During her recovery period, she often looked pale and moved with great caution. By the story’s ending, these scars had faded considerably. Her hands serve as a vital vessel for her emotions. When frightened, she would tightly grip the hem of her clothing or cling to her father’s trouser legs. She also endured punishment for taking the blame on Molly’s behalf.
