He was such a nice person before he met Damien, but to be devilate and by him made him oh so bad.
By Elwira
Devil
Arch Angel Lucifer
As a biproduct of Lucifers jealously of god, he was cast out of heaven and took 1/3 of all angels with him. These 1/3 angels were damned willingly and unfaithfully to god. Lucifer was holy but angels too can go on their own volition, thus becoming fallen angels but unlike humans, cannot be redeemed like human kind.