In Jane Eyre, St. John is a clergyman who befriends Jane after he found her in the streets. Jane comes to live with him and he eventually finds her a teaching job at a charity school. Jane inherits a massive fortune after her uncle, John Eyre dies and decides to share it with St. John and her newfound relatives.
After a couple of years, St. John decides to travel to India as a missionary. He offers Jane to marry him and travels there with her. Jane is <em>saddened by this</em>, as Rochester is her true love. However, she ultimately decides to go with him but not marry him.