Thurren is an original member of the group from Phandalin who now makes up the The Phandalin Council. He was killed by the Vistani sent by Strahd. The group managed to bring him back to life in Barovia and there he helped them to kill Strahd. He’s a good friend of the group, especially close with Reyleth. He’s also the main owner of the Dwarfs elbow