emancipator

/ɪˈmænsəˌpeɪtər/
noun
  1. A person who frees someone from slavery, oppression, or control.
    • The activist was hailed as an emancipator of the poor and marginalized.
    • In the story, the hero becomes an emancipator, freeing the villagers from the tyrant's rule.
    • Abraham Lincoln is often called the Great Emancipator for his role in ending slavery in the United States.
Synonyms