Zestial speaks in an archaic dialect redolent of early modern English He has a very sophisticated way of speaking and often keeps his temper rather than get easily frustrated as the case when Velvette mocks him Though he is shown to be somewhat petty loudly sipping his tea to cut Velvette off mid-sentence before opposing her proposal to fight back against the Exorcists His reputation is such that demons other than his fellow Overlords are terrified of him hiding or cowering whenever near