Lucifer

Lucifer is one of the six ArchDevils and among them he is not only the strongest but the first to fall out of grace.Also Lucifer is the only ArchDevil to ever hold the title of Satan, meaning oppisite force of the One God.

History
Before falling from grace Lucifer was one of the Seraphim and described by his angelic brethern as being the most beatiful, charismic, and compelling of the Angel.