<Li> Anjelica Huston as Queen Usurna, the queen of the Krubera, AAARRRGGHH!!!'s race who live in the Deep Caverns, and a member of a council of troll leaders known as the Tribunal . She initially seems to be a kind queen concerned for AAARRRGGHH!!!'s well - being . As a Tribunal member, she is strict and judgmental, and leads the Tribunal to act against Jim and his friends . Late in Part 2, she reveals herself to be a traitor who works for Gunmar and helps him take over Trollmarket . </Li> <Li> Cole Sand as Eli Pepperjack, a nerdy classmate of Jim who believes in the paranormal . In Part 2, he teams up with Steve Palchuk to investigate the strange creatures they both have seen and to help Jim . </Li> <Li> Lena Headey as Morgana / The Pale Lady, an ancient and seemingly malevolent entity and the patron of Angor Rot . </Li> <Li> Tom Kenny as Otto Scaarbach, a Changeling Polymorph who can change into the form of anyone . He is the Grand Commandant of the Janus Order, a secret society of Changelings who assist the Gumm - Gumms . </Li>

Who plays the voice of morgana in trollhunters