<Li> Lauren Tom as Nomura, the Changeling museum curator and a colleague of Strickler . Originally an antagonist, she was pulled into the Darklands and imprisoned by Gunmar for her failures . When Jim is captured in the Darklands, the two form a connection and escape together . </Li> <Li> Jimmie Wood as NotEnrique, the Changeling swapped with Claire's baby brother Enrique . While troublesome and self - serving, he isn't actively malicious and even helps the Trollhunters from time to time (usually after being bribed). He forms a rocky but brotherly connection with Claire . </Li> <Li> Clancy Brown as Gunmar, the iron - fisted leader of the Gumm - Gumms who reside in the Darklands . He is powerful and ruthless, and will readily dispose of loyal minions and allies who can no longer serve him . He has no qualms about enslaving or killing his fellow trolls to accomplish his goals . </Li> <Li> Tom Hiddleston and James Purefoy as Kanjigar the Courageous, Draal's father and the noble Trollhunter prior to Jim . His ghost tutors Jim, often worrying about Jim's team fighting style, believing that the Trollhunter must work alone to avoid endangering those he cares about--this leads to Jim's guilt and decision to venture into the Darklands alone . Hiddleston provided the voice acting for Kanjigar during the series premiere, while Purefoy was cast to assume the role for the rest of the series . </Li>

When does season 4 of trollhunters come out