(Here are the things you need to know about Lucifer. Every angel knows most of this, as well as every fallen angel and probably 99% of the demons. Not every Chosen One is going to know this stuff, and chances are most humans don't either.)
Celestial Hierarchy: Seraphim (not that it applies any more)
Duties: (fallen) Angel of Dawn/light; (fallen) angel of death; ruling
prince of hell.
Important points to keep in mind
Lucifer is the ruling prince of hell, meaning he's the top guy, the only one truly in charge. The other princes of hell are under him in hierarchy.
He was once an archangel, the highest archangel in fact, even higher than Michael.
He is the personification of the brightest star (planet technically, remember in biblical times they thought it was a star) in heaven, Venus. He's the morning/evening star, the brightest of all angels.
Traits only Lucifer has (as in, no one else can do this shit, don't write it into your character)
Lucifer is the only one that truly rules hell (can I state this enough?).
Things everyone knows about Lucifer
He's in a bad mood, has been for a few millennium.
He's maintained a good relationship with Gabriel. Most contribute this to the two being frighteningly a lot like in personality (mainly they both are very cruel and get off on scaring others) and the fact that Gabriel technically works him… but by Gabriel's will not Lucifer's.
He's fairly reclusive.
He controls the element of light (umm… light isn't an element… It is now!)
He always maintains a cool exterior, it rarely slips.
Lucifer is very suave. When he's wanting to be, he's very likable, but will turn on you in a split second.
Lucifer rarely does his own dirty work. If he does, it's extremely important.
He's officially not allowed in heaven, though has been summoned to the Gates of First Heaven on occasion.
Things not so well known about Lucifer (angels and fallen angel information, all other characters forget you read this)
He's been known to do heaven's bidding on occasion. No one knows why he does, really.
He's not very fond of the other fallen angels. Sometimes he needs to remind them of that.
Hell is Lucifer, a major part of it was created by his essence, so he tends to hear everything that goes on. He's also got a lot of spies.
As much as he dislikes the fallen angels, he does look out for them. He prefers to maintain an image of hell, so when hell embaresses him, he will get on your case for it, but when ever heaven is mucking around too much, he will remind them, not so gently of his position. He also makes Gabriel resurrect a lot of those that are killed by heaven.
(Played by Nivik)
Apparent age: Mid 20's.
Physical appearance: Black hair; green eyes; usually sports white wings to throw everyone off a bit. Looks a bit of a goth.
Male:6 foot 5 inches; hair kind of short ; well built; always well dressed, usually in black.
Female: 6 foot 5 again; usually wears hair kind of long; a classic sort of beauty that's a little disturbing.
Fallen angel of: Dawn/light; (fallen) angel of death; ruling Prince of Hell. Personification of the (planet) star Venus.
First impression: By his nature of a fallen angel, he presents himself a little bit untrustworthy; yet somehow he has a magnetic personality. You don't want to trust him, you don't want to like him. Somehow though, you just can't take your eyes off of him.