Vierna Do'Urden is the second oldest sister of Drizzt.
Vierna Do'Urden was the second sister of Drizzt Do'Urden, younger than Briza but older than Maya. Her mother was Malice Do'Urden and her father was Zaknafein Do'Urden. She is Drizzt's only full sibling, his other siblings being half-siblings, children of Malice and Rizzen, instead of Malice and Zaknafein. Vierna is the only one of his three sisters for whom Drizzt felt any affection, because he recognized that, like him, she had inherited small goodness in her from Zaknafein. She was Drizzt's primary caretaker when he was a child, and alone of the rest of the family, she could sometimes show some kindness to Drizzt. Becoming a priestess of Lolth made it impossible for her to break free of the evil of the drow and Menzoberranzan like her brother Drizzt would. In The Legacy, the first book of the Legacy of the Drow series, Vierna had descended into Lloth-inspired madness; she turned her half-brother Dinin Do'Urden into a drider and joined the forces of Jarlaxle to hunt down Drizzt, with whom she had become obsessed. She failed, however, and Drizzt was forced to kill her in self-defense.