Who is Isabella in twilght?

Isabella Swan, or commonly know as Bella, is the main character in the saga of "Twilight". She moves to Washington after she decides that her Mum, Renee Dwyer, is unhappy with not being able to travel with her new husband, Phil, Bella goes to live with her Dad, Charlie, who is the Chief Police of a small town called Forks. All four book are based on Bella, her boyfriend, Edward Cullen and her best friend Jacob Black.