Who is Matthew Pyke from The Buddha of Suburbia and what is their importance?

Matthew Pyke is a well known theater director who elevates Karim's career. He is a good director because he can manipulate people and situations, but he carries this into his real life as well. Pyke is coldhearted and uses others for his own amusement and gratification. He is the architect behind Karim and Eleanor's relationship and he engineers its downfall as well as its inception. Karim is always suspicious of Pyke, but allows himself to be used, mentally and physically, to advance his own career.