Barbara, Lady Villiers — Elizabeth St. John

Barbara St.John Villiers has always despised her sister Lucy, and when Theo Howard, Earl of Suffolk, fell in love with her, Barbara thought she'd die of jealousy. Instead, she decided to get even by befriending someone even more scandalous than herself, Theo's sister, Frances Howard, Countess of Somerset. Unfortunately, Frances was then imprisoned in the Tower of London, accused of murder, and Barbara had to find a way to turn this to her advantage – and continue her vendetta against Lucy.