Michael.
Who was Michael?
According to the bible and many legends of mankind, Michael was the most powerful archangel in the heavens and was second only behind God not only in prestige but also in strength.
The reality was not much different and one of the major differences was that in contradiction to popular beliefs on Earth, Michael was not more powerful than Lucifer in any way.
However, the aforementioned did not mean that this powerful archangel of the Seventh Order did not have his ways of making demons suffer. This was because 80% of those who joined the Demonic Army used powers based on dark elements and Michael's mighty flames powered by the light powers that the angels could use to perfection thanks to their modified records after joining the Army of Heaven were the natural nemesis of the powers used by most in the Demonic Army.