Who was Henry VIII favourite sister?

Actually, Henry had two sisters. His youngest sister was Princess Mary Rose Tudor (1496 - 1533), who was apparently much favoured. The warship Mary Rose was named after her. She was married twice, first to the King Louis XII of France, and then, when widowed, to Henry's best friend, Charles Brandon, Duke of Suffolk. They were the grandparents of Lady Jane Grey, the "nine days queen".