Oh I would love to study psychology XD I can't really figure out why charismatic people would most likely be psychotics, but the angel Lucifer (soon to be Devil) must have had some pretty damn good people skills if he managed to turn a large part of Heaven against God o_o and being able to tempt people ain't easy if nobody can stand being near you either o_o
Well, there's a history of it. Think of all the world's most evil leaders. What do they all have in common? Charisma and suave language.It's the same with cult leaders. I did this big study on the difference between cults and religion, and I had this whole sub section about cult-related crimes. Not only were the leaders behind the crimes absolutely psychotic, but they were extremely charismatic. With charisma, one could manipulate people to do anything (or almost anything depending on the individual). That's quite a bit of power, and power corrupts.
Psychology is awesome! Hella difficult though. But I've found that freelance research comes a lot easier than school-based research xD
*shiver* Man, this guy scares me. I think I would be just a LIIIITTLE freaked out to meet the devil incarnate if we were to meet in the Real. I'd probably be hiding behind my guy characters and voraciously reading my Bible while they fight. XD I do like all of the thought and detail you put into his character. Very fitting for the Devil to be charismatic and manipulative and all of these other things.