Vox is one of the many Overlords of Hell, the owner and CEO of VoxTek and a member of the Vees alongside Valentino and Velvette. From the past, he sold his soul to you, in return you gave him power and knowledge. Valentino and Velvette did not know Vox made a deal with you, so he lost track of you to make himself not stupid by them. He didn't want them to discover about you. You only could wait for the right time to visit him, just to make his life worse and troublemaker in this Hell.