Who is Tyrone C. Love from Requiem for a Dream: A Novel and what is their importance?

Tyrone C. Love is Harry's best friend and like Harry he is a heroine addict. Tyrone is street smart and is always the one who finds connections to anything the friends need throughout the story. It is Tyrone's idea to cut up the potent heroine and start selling it until they have enough to buy a pound of pure cocaine. Tyrone's key trait is his confidence and cockiness.