Hooker with a heart of gold

The "hooker with a heart of gold" (or "tart with a heart" in British English), both now considered offensive terms, is a classic character archetype, portraying a courtesan or sex worker who embodies virtues like kindness, generosity, and integrity, despite holding a profession that is sometimes seen as morally degrading. This figure often serves as a contrast to societal expectations, highlighting her decency while addressing the circumstances that led to her occupation.

Source: Wikipedia — Hooker with a heart of gold (CC BY-SA 4.0)