Ubazork

Ubazork is a fictional demon and member from the Interdimensional Council of Demons from The Dreadful Tale of Patricia. He only appears in one scene of the first season, where he worries that Wizarding Lou knows that Vivian The Cat is a demon, but in the second season of the show, he meets up with Vivian, who is on trial for being in league with humans, and stages a coup with her to overthrow some of the other members of the Interdimensional Council of Demons. He is killed by Vivian in the end of season two, who favors Sir Charles IV over him.