The "original rebel
", who was also the most beautiful angel
. After rebelling against God
, he resided in Hell
for some time (or he created it from some already existing plane).
But soon all the anger and fury towards God that Lucifer felt took a form of its own - by seperating from Lucifer. This was the "birth" of Satan
. Satan represents anger, and Lucifer is represents sorrow - or remorse or regret.
Lucifer is considered the original rebel.