Diabolical : characteristic of the Devil, or so evil as to be suggestive of the Devil.Mischievous : causing or showing a fondness for causing trouble in a playful way.Lavish : sumptuously rich, elaborate, or luxurious.Seraphic : characteristic of or resembling a seraph or seraphim; angelic.Azure : bright blue in colour like a cloudless sky.Antonym of Diabolical is Seraphic