Caroline Irene "Carreen" O'Hara is the youngest of the three O'Hara girls. Careen was sweet dispositioned and quiet and hence did not pick quarrels in the family which was why Scarlett favoured her above Suellen. She loved Brent Tarleton, one of her sister's beaux dearly and when Scarlett married Charlie, he began courting her. However, Brent's death in the war impacted her enormously and she turned to her only support-her religion which was why she joined a convent in Charleston and became a nun.