The term 'Twelfth Night Heroine' refers to two characters from William Shakespeare's play Twelfth Night: VIOLA and Olivia. VIOLA is a young woman who is shipwrecked on the coast of Illyria and disguises herself as a man in order to gain employment with the Duke Orsino. Olivia is a wealthy countess who falls in love with VIOLA, not knowing that she is a woman. Both VIOLA and Olivia are strong female characters who demonstrate courage and resilience in the face of adversity.