Who is Changez, Bubbles from The Buddha of Suburbia and what is their importance?

Changez is Jamila's husband, sent to England by Anwar's brother. He is an odd character, both fascinated and repulsed by England. Changez has a withered arm and, on the surface, is stupid and lazy, but this appearance hides a man who can be quite astute when needs be. He is devoted to Jamila although she consistently rejects him. Although he never gets the traditional marriage that he wants, he is able to manipulate her well enough to ensure that he remains in her life.