Who is Storm Courtney from A Sparrow Falls and what is their importance?

As dainty as a hummingbird, Storm Courtney almost floats with a grace that is breathtaking. She has large, dark and haunting eyes and a bold brow that is pale and wide. Her hair is deeply black and lustrous and hangs in a tumble of thick waves. She has long and tapered fingers attached to strong hands, and is tall with a tiny waist. Her long legs and poise complete a picture of almost sculpted beauty. Her neck is swanlike, long and delicate, and her mouth is full of small and regular teeth.