Sadistic and manipulative. Obsessed with beauty, and the beauty in suffering.

Das - Raised by serial black widow mom, wants him to be one as well, grows up to be more of a serial torturer than killer, he doesn't actually like killing. Trusts literally no one, ever, unless they are so completely in his power they can't escape.

Daemon - raised by abusive rich (and often noble) bio-dad, grows up to be a good-hearted artist who wants to make the world better and help people less fortunate. Disgusted by the rich/nobility. A huge romantic who gets himself into all sorts of messes with that. Sadistic tendencies kinda repressed, still finds suffering beautiful and is oriented around beauty - and innocence - in general.