Who is Charlie Kay, Charlie Hero from The Buddha of Suburbia and what is their importance?

Charlie is Eva's son. He is callous and manipulative. He has no true sense of self and adopts personalities as quickly as others change clothes. He has aspirations to becoming a musician, though he himself lacks talent and originality. Nonetheless, Charlie is astute enough to recognize trends and his ability to discard personas and adopt new ones enables him to embrace the fledgling punk rock movement and act the role required to become a big star.