Name:   Aion "The Sinner"
Sex: Male
Age: ??
Age Appearance: about 20
Hair: White
Eyes: Black
Place of origin: Pandaemonium
Race: Demon
Personality: Cunning, charismatic, thoughtful, obsessive, ambicious
Background: Leader of the Sinners who betrayed Pandaemonium, the demon society. He killed the demon queen in the name of liberty and escaped to earth with a group of other demons.
Aion placed his trust in Chrono.  Chrono, however, didn't believe in some of Aion's ideas and left him.  Although Aion appears to enjoy making Chrono suffer, he's still willing to accept him as an ally again. 
Aion does care about his followers, but he is also willing to sacrifice them to help him achieve his goal; the destruction of Pandaemonium and the rebirth of the world.  He is determined to achieve this, no matter what the consequences.  His hatred and fear of Pandaemonium drive him almost to the point of obsession.

((Scratch that.  Just give me something to work with please.  I can't stand it when all I get is someone randomly deciding to say "hi."))