Twelfth Night William Shakespeare Short questions with answers: 1. Who was Sebastian? Ans: Sebastian was a young gentleman of Messaline. 2. Who was Viola? Ans: Viola was the twin sister of Sebastian of Messaline. 3. Who was Olivia? Ans: Olivia, a fair, virtuous maid, was the daughter of a count. 4. Who was the Duke of Illyria? Ans: Orsino was the duke of Illyria. 5. Where was Viola seperated from her brother? Ans: Viola was seperated from her brother during the wreckage of the ship on the coast of Illyria.