User blog:Crimson Marauder/Vampires wielding cursed weapons???

Okay this literally just came from a random conversation I was having with a fellow friend of mine.

The talk led to Asura and Krul being siblings, but one of them had been slained and lives as a demon while the other sits upon the throne and fights against the side the other is forced to be on.

So WHAT IF, somehow, Krul got ahold of Asuramaru (the weapon) and wielded it? I understand Asura is still contracted to Yu, but is it possible for him to break it or at least ignore it for the sake of his sister??? Let's go out on a wild limb here and say Krul uses him in combat.

As well all know, demons possesses the wielder to feed on their desires and eventually take over their mind and body. But with this being between siblings that - no doubt - love each other greatly, then how would this play out? Would Asura withhold his desire and need to feed on Krul in order to protect her, yet offering all of his power for her to wield and use? OR it could be that Krul insists for Asura to do what he needs to do/wants to do, and she won't mind it simply because, well, they're siblings.

I'm actually wondering about more theories on this - two different ones actually.

First is, CAN a vampire wield a demon weapon? Excluding Krul and Asura's relationship as an example?

Second is, if a vampire CAN wield a demon weapon, how would it react to them as since it's their ex-brethren after all.

I'm really curious and interested~