Whitelighter is a guardian angel who protects and guides good witches and future Whitelighters to protect and nurture them for their intended destiny. A person can become a whitelighter when he or she is destined to be one and fulfills their destiny in life, thus given the choice to be reborn as whitelighters or move on to the afterlife upon their death.

The Whitelighters are led by the Elders, a council of powerful and experienced Whitelighters that serve the greater good. The Elders manage Whitelighters and assign them to charges, although sometimes this connection happens naturally.