Zestial is a very tall and thin-built, spider-like demon with dark gray skin and lime-green eyes. He wears all-black clothing, with a pitch-black cloak that covers most of his body. When Zestial unfurls his cloak, his eyes glow and the top pair gain red irises. He has a very sophisticated way of speaking, and often keeps his temper rather than get easily frustrated. His reputation is such that demons other than his fellow Overlords are terrified of him, hiding or cowering whenever he passes by.