Who is Jill Masterton from Goldfinger and what is their importance?

Jill Masterton is Goldfinger's paid companion while he is staying at the Floridiana Hotel in Florida, Jill Masterton is part of Goldfinger's scheme to cheat at cards. She spies on his opponent's cards from their hotel room with high-powered binoculars and transmits them by voice to Goldfinger's hearing aid receiver, allowing him to win. Masterton leaves Goldfinger temporarily to travel by train to New York with Bond. Despite Bond's warnings, she returns to Goldfinger, who kills her by painting her entire body in gold, suffocating her.