Where does an actual person leave off and a stage character start?

Mrs. Macdonald came through the door like a stage character on cue.

He became less of a stage character and more of a real person.

Ratschkathl is a stage character of the Bavarian popular theatre.

Yet none of the three stage characters are transformed into real people, even though they are reaching for contact.

Nothing of the stage character but his name made it into Baum's books.

Too bad such volatile possibilities for a fabulous stage character remain untapped.

He is the leader of the evil stage characters.

As a stage character, though, he has never embodied the warmth of his best melodies.

But the Inge gallery of magical stage characters remains evermore.