Danvan-Valentine Hastur served as Regent to Derik Elhayln, at the time age 5, after King Stefan died. Once while being introduced by Valdir Alton the full title given to him was "Danvan Hastur of Hastur, Warden of Hastur, Regent of the Seven Domains, Lord of Thendara and Carcosa. While serving as Regent of the Domains of Darkover Danvan has taking them through troubling and turbulent times due to the Terran presence and with internal affairs of the Domains. Danvan is the grandfather to Regis and Javanne Hastur.