Unfaithful in example sentence
The only person unhappy about the situation was Edgar Rice Burroughs, who, while he'd agreed to MGM's creative liberties, and enjoyed his hefty royalty checks, felt the 'dumbed down' version of his character (with no plans to allow him to 'grow') was unfaithful to his vision (he would start a production company, and soon be making his own 'Tarzan' films).