ummmm, John Wayne is a fictional character.
Marion Morrison quoted what ever was written for him.
John Wayne was not a fictional character.
John Wayne was the legitimate stage name of Marion (Duke) Morrison.
Sergeant John Stryker
J. B. Books
Were just a few of the many fictional characters played by Duke Wayne.
And I guess you missed all the John Wayne quotes and unscripted interview answers.
That used to get him in so much trouble with the left wing press.