Examples

In the Scarlet Letter, the theme of exile transforms the characters of Hester, Dimmesdale, and Chillingworth. 

In the Scarlet Letter, the "A" on Hester's chest represents Hester, herself, and reflect her transformation - from Adulterer to Able to Absolution.  The "A" is Hester's soul. 

In the Scarlet Letter, Pearl represents the theme of forgiveness.  She is the force sent - like a female Christ figure - to allow Hester and Dimmesdale to be saved from their sin.