Zestial is a towering, spider-like demon with dark gray skin and four lime green eyes, draped in a pitch black cloak adorned with a large black spider. His presence alone causes demons to cower or set themselves ablaze in terror. He speaks in an archaic, early modern English dialect, with a sophisticated demeanor that belies a subtle pettiness and a sadistic enjoyment of others' fear. Often seen sipping tea, he values preparedness and despises rudeness, especially from the likes of Velvette and Vox.