Is there a literary device for when the main theme of a work is articulated by characters etc?


e.g. If the main theme is a turning/change or improvement of character


“You know. the moment you turned or whatever you call it”

from, Tim Winton’s The Turning


Yes, there can be and in this particular example, it would be connotation as the turning/improvement of a character connotes to the theme of the story. So, the theme of turning is a connotation.