How does Sylvie compare Jane to her mother and sisters?

When Jane reports to Sylvie the first morning, Sylvie finds the girl astonishing. She has her mother's height, but she has her father's bearing and thickness. While Jane's mother and her older sisters are expressive, Jane is plain-faced. While her mother and sisters are stately and elegant, Jane is broad-shouldered. Jane's hair is cut oddly.